Transformer Terminal
Buyer’s Guide
RET 541,
RET 543,
RET 545
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Issued: February 2005
Status: Updated
Version: C/15.06.2005
Data subject to change without notice
Features
• Transformer terminal for protection, control,
measurement and supervision of two-winding power transformers and generatortransformer blocks in distribution networks
• Designed to withstand harsh environments
e.g. in heavy industry, marine and offshore
applications
• Three-phase current differential protection
with stabilized and instantaneous stages
for fast and selective winding short-circuit
and interturn fault protection as main protection
• Fast and reliable operation even with saturating CTs
• Numerical implementation of vector group
matching allows wye-connection of measuring CTs as standard without interposing
CTs, irrespective of transformer vector
group
• Restricted earth-fault protection with the
conventional high impedance principle or
the stabilized numerical principle
• Three-phase overcurrent and earth-fault
back-up protection with definite time and
IDMT characteristics for both windings
• Optional automatic on-load tap-changer
control function for single or parallel transformers using the Master-Follower, Negative Reactance or Minimizing Circulating
Current principles
• Supports several methods to interface tapchanger position information to differential
protection and voltage regulator
• Measurement of two sets of three-phase
currents, phase-to-phase or phase to neutral voltages, neutral current, residual voltage, frequency, power factor, active and
reactive power and energy
• Condition monitoring including circuitbreaker condition monitoring, trip circuit
supervision and internal self-supervision of
the transformer terminal
• Extensive set of integrated communication
protocols: SPA, LON, IEC 60870-5-103,
Modbus RTU/ASCII, DNP 3.0
• Interface to Profibus DP and IEC 61850
based systems via adapters
• Part of ABB’s substation automation system
• Thermal overload and negative phase
sequence protection
• Additional protection functions available in
the Multi –version terminal: overexcitation,
overvoltage, undervoltage, residual overvoltage, directional overcurrent and earthfault, overfrequency, underfrequency and
underimpedance line back-up protection
• Large graphic display, either integrated or
as an external module
• Control functions including local and
remote control of switching objects, including object status indication and interlockings on bay and substation level
Fig. 1
ret54_mimic_co180dpi
Mimic view of RET 54_ transformer terminal.
3
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Application
The RET 541/543/545 transformer terminals
are designed to be used for the protection,
control, measurement and supervision of twowinding power transformers and generatortransformer blocks in distribution networks.
RET 54_ terminals can also be used in harsh
environments e.g. in heavy industry, marine
and offshore applications.
The main protection function is three-phase
current differential protection with stabilized
and instantaneous stages for fast and selective
winding short-circuit and interturn protection.
Besides 2nd and 5th harmonic restraints, the
stabilized stage also includes a waveform recognition-based blocking-deblocking feature.
Reliable operation even with partially saturated current transformers, that is, short operate
times at faults occurring in the zone to be protected and high stability at external faults are
achieved. Increased sensitivity can be obtained by automatic adaptation to the position
changes of the on load tap changer. Interposing current transformers are not needed: Any
vector group matching and CT ratio corrections in a wide range are numerically implemented as well as zero-sequence current
elimination, which prevents unwanted trips at
earth faults occurring outside the protected
area.
In addition to the differential protection, the
Basic version terminals incorporate the following protections: Restricted earth fault protection with stabilized numerical or high
impedance principle, unbalance and thermal
overload protections, three phase overcurrent
and non-directional earth fault back-up protection with definite and IDMT characteristics on both sides of the transformer.
The Multi-version terminals, further including overvoltage and undervoltage, residual
overvoltage, underfrequency and overfrequency, overexcitation, directional earthfault, directional overcurrent and underimpedance line back-up protections fulfill the
most demanding application requirements.
Enhanced with the optional automatic voltage
regulation function, the RET 54_ terminal
can be applied as a comprehensive integrated
transformer management terminal. The voltage regulator can be applied for a single
transformer or for parallel transformers with
Master-Follower, Negative Reactance or
Minimizing Circulating Current principles.
A special control version terminal with voltage regulator and control functions can be
applied, when integration of voltage regulation and protection is not allowed.
4
The graphical configuration tool, based on
the IEC 61131-3 standard, enables easy creation of application-specific configurations
and MIMIC pictures corresponding to different switchgear systems. The process status is
shown on a dynamic large graphical display.
Detailed information, for instance, measured
values, events and application-specific
alarms, are presented in the display views.
The RET 54_ terminals can measure two sets
of three phase currents, phase-to-phase or
phase-to-earth voltages, neutral current,
residual voltage, frequency and power factor.
Active and reactive power is calculated from
the measured currents and voltages. Energy
can be calculated on the basis of the measured power. The measured values can be
indicated locally and remotely as scaled primary values.
With the condition monitoring functions the
RET 54_ transformer terminal monitors e.g.
trip circuits, gas pressure of the breaker and
breaker wear and provides scheduled time
intervals for maintenance.
The RTD1 card, available as an option to the
RET 541 and RET 543 terminals, provides
versatile analog inputs enabling e.g. tap position supervision of the on load tap changer,
RTD inputs for top and bottom oil temperature monitoring, and ambient temperature
biasing for accurate thermal overload protection. The mA outputs allow transfer of any
measurement data e.g. to PLCs.
By means of the graphic HMI display, the
control functions in the transformer terminal
indicate the position of disconnectors, circuit
breakers and tap changer locally. Local control of these objects is possible via the push
buttons on the front panel of the terminal.
Furthermore, the terminal allows position
information of the objects to be transmitted to
the remote control system. Controllable
objects, such as CBs, can also be opened and
closed over the remote control system.
Supporting a wide range of communication
protocols, including SPA, LON, IEC 608705-103, DNP 3.0 and Modbus RTU/ASCII,
commonly used by utilities and industries, the
terminals are flexibly integrated into different
control systems. Connection to Profibus DP
or IEC 61850 based system is possible via the
interface adapters SPA-ZC 302 or SPA-ZC
400, respectively.
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Design
The transformer terminals RET 541, RET
543 and RET 545 differ from each other
regarding the number of digital inputs and
outputs available. Please, refer to section
“Ordering” for more details.
The functions of the RET 54_ transformer
terminal are categorized as:
• protection functions
• measurement functions
• control functions
• condition monitoring functions
• communication functions
• general functions
• standard functions
The functions are further divided to three subsets that correspond to different functionality
levels, refer to section “Ordering Information”
Protection functions
Protection is one of the most important functions of the RET 54_ transformer terminal.
The protection function blocks (e.g.
NOC3Low) are independent of each other
and have e.g. their own setting groups and
data recording.
The protection function blocks are documented on the CD-ROM “Technical Descriptions of Functions” (1MRS750889-MCD)
Measurement functions
The measurement function blocks are documented on the CD-ROM “Technical Descriptions of Functions” (1MRS750889-MCD)
Control functions
The control functions are used to indicate the
position of switching devices, i.e. circuit
breakers and disconnectors, and to execute
open and close commands for controllable
switching devices in the switchgear. Furthermore, there are supplementary functions for
control logic purposes, e.g. on/off switches,
MIMIC alarm, LED control, numerical data
for the MIMIC and logic controlled position
selection.
The control functions configured using the
Relay Configuration Tool can be associated
with position indicators that are part of the
MIMIC configuration picture displayed on
the HMI. Position indicators are used to indicate the position of switching devices via the
MIMIC picture and to control them locally.
The control function blocks are documented
on the CD-ROM “Technical Descriptions of
Functions” (1MRS750889-MCD)
Condition monitoring functions
The condition monitoring function blocks are
documented on the CD-ROM “Technical
Descriptions of Functions” (1MRS750889MCD)
General functions
Additional functions are available for different general purposes to be used in logics such
as activation of HMI backlight, switchgroups,
and resetting of operation indications, latched
output signals, registers and disturbance
recorder.
Communication functions
The RET 54_ transformer terminal provides
the IEC_103, Modbus, DNP 3.0, SPA and
LON serial communication protocols.
In a customer-specific transformer terminal
configuration, special events can be generated via an EVENT230 event function.
EVENT230 is documented on the CD-ROM
“Technical descriptions of Functions”
(1MRS750889-MCD).
Standard functions
Standard functions are used for logics, such
as interlocking, alarming and control
sequencing. The use of logic functions is not
limited and the functions can be interconnected with each other as well as with protection, measurement, power quality, control,
condition monitoring and general functions.
In addition, the digital inputs and outputs as
well as LON inputs and outputs can be connected to standard functions by using the
Relay Configuration Tool.
The standard function blocks are documented
on the CD-ROM “Technical descriptions of
Functions” (1MRS750889-MCD).
Other functions
Low auxiliary voltage indication
The RET 54_ transformer terminal is provided with a low auxiliary voltage indication
feature. The power supply module issues an
internal alarm signal when a drop in the
power supply voltage is detected (ACFail,
active low). The alarm signal is activated if
the power supply voltage falls about 10%
below the lowest rated DC input voltage of
the power supply module.
5
Transformer Terminal
RET 541, RET 543,
RET 545
1MRS755543
Design (cont´d)
The indication of a low auxiliary voltage is
available in the transformer terminal configuration and can be connected to any signal output of the RET 54_.
tion of a digital input can be inverted. The
programmable filter time removes debounces
and short disturbances on a digital input. The
filter time can be set for each digital input
separately.
Overtemperature indication
The RET 54_ transformer terminal includes
an internal temperature supervision function.
The power supply module issues an internal
alarm signal when overtemperature has been
detected inside the terminal enclosure. The
alarm signal will be activated once the temperature inside the terminal enclosure
increases to +78°C (+75°...+83°C). Overtemperature indication is available in the
transformer terminal configuration and can be
connected to any signal output of the RET
54_.
Analog channels
The transformer terminal measures the analog
signals needed for protection, measuring, etc.
via galvanically separated matching transformers.
RET 54_ transformer terminals have 9 analog
channels. Furthermore, the transformer terminal includes virtual analog channels for calculating the residual current and residual
voltage from phase currents and voltages.
Both the amplitude and the phase angle are
calculated for the virtual channels.
Note! When sensitive earth-fault protection is
needed, core balance transformers are not
recommended to be replaced with the numerically derived sum of phase currents. Normally, an earth-fault setting below 10% of the
rated value requires the use of a core balance
transformer.
Analog channels of the transformer terminal
are configured with the CAP 505 Relay Product Engineering Tools.
A separate scaling factor can be set for each
analog channel. The factors enable differences between the ratings of the protected
unit and those of the measuring device (CT
and VT ratio corrections). The setting value
1.00 means that the rated value of the protected unit is exactly the same as that of the
measuring device.
Digital inputs
The digital inputs of the transformer terminals are voltage controlled and optically isolated with three treshold voltages defined by
the order, see chapter “Ordering”. The func-
6
Some specific digital inputs can be programmed to operate either as digital inputs, as
pulse counters or as used for time synchronization. When a digital input operates as a
pulse counter, pulse counting frequency can
be up to100 Hz.
Oscillation suppression
The transformer terminals have two global
parameters for the suppression of digital input
oscillation. The settings of these parameters
determine the oscillation level and hysteresis
for all digital inputs. Event is generated in
case oscillation is detected.
Attributes of a digital input for transformer
terminal configuration
For each digital input, the status of the input
(value), the time tag for the status change
(time) and the validity of the digital input
(invalidity) can be issued by the attributes.
These attributes are available in the transformer terminal configuration and can be
used for various purposes.
RTD/analog inputs
The RET 541 and RET 543 transformer terminals equipped with an RTD/analog module
(RTD1) have eight general purpose analog
inputs for DC measurement. The RTD/analog
inputs are galvanically isolated from the
transformer terminal power supply and enclosure. However, the inputs have a common
ground. The general purpose RTD/analog
inputs accept voltage-, current- or resistancetype signals. For each measuring mode, a
separate parameter is provided for choosing
between the available measurement ranges.
RTD/analog inputs can be applied for e.g.
temperature measurement.
Digital outputs
The outputs of the transformer terminal are
categorized as follows:
• HSPO: High-speed power output, doublepole contact, preferred for tripping purposes and for circuit breaker and disconnector control
• PO: Power output, either single-pole or
double-pole contact, preferred for circuit
breaker and disconnector control
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
• SO: Signal output, either NO (Normally
Open) or NO/NC (Normally Open/Normally Closed) contact. The output contact
is a normal-duty contact and cannot be
used for controlling a heavy load such as a
circuit breaker.
Analog outputs
The RET 541 and RET 543 transformer terminals equipped with an RTD/analog module
have four general purpose 0...20 mA analog
current outputs. All outputs are galvanically
isolated from the supply and enclosure of the
transformer terminal and from each other.
Analog outputs can be utilized for transferring any measured or calculated information
to panel meters or e.g. PLCs.
Alarm LED indicators
The transformer terminal offers eight alarm
LED indicators to be configured with the
Relay Mimic Editor. The LED colours (green,
yellow, red), their use, and the ON and OFF
state texts can be freely defined. Three basic
Display panel
The transformer terminal is provided with
either a fixed display or an external display
module. The external display module requires
a separate voltage supply from a common
source with the main unit. The display consists of 19 rows divided into two windows: a
main window (17 rows) and an assisting window (2 rows).
The graphic display presents detailed information on MIMIC, objects, events, measurements, control alarms, and parameters. The
assisting window is used for terminal-dependent indications/alarms and help messages.
Additionally, the panel includes the following
HMI items:
• three push-buttons for object control (I, O,
object selection)
Serial communication
The transformer terminal has three serial
communication ports, one on the front panel
and two on the rear panel.
The standard optical ABB connector
The standard optical ABB connector (RS-232
connection) on the front panel is intended for
the connection of a PC for configuring the
transformer terminal with the CAP 50_ tools.
The front interface uses the SPA bus protocol.
operation modes are supported: non-latched,
latched-steady and latched flashflashing.
Alarms can be acknowledged remotely,
locally or by using logic of the transformer
terminal.
The alarm channels include time tagging for
detected alarms. The time tagging principle
used depends on the operation mode.
Interlocking LED indicator
The interlocking LED indicates that control
operation has been interlocked or that the
interlocking is in bybass mode, e.g. when
control is possible despite of interlocking.
Trip Circuit Supervision
The purpose of this function is to supervise
the tripping circuitry of the circuit breaker.
An alarm will be generated in case a faulty
tripping circuit, e.g. a circuit is not able to
perform a trip, is detected.
The supervision is based on the constant-current injection through the tripping circuitry.
• eight freely programmable alarm LEDs
with different colours and modes according to the configuration
• LED indicator for control interlocking
• three protection LED indicators
• HMI push-button section with four arrow
buttons and buttons for clear and enter
• optically isolated serial communication
port
• backlight and contrast control
• freely programmable button (F) which can
be used in the configuration of the transformer terminal
• a button for remote/local control
HMI has two main levels, the user level and
the technical level. The user level is for
“everyday” measurements and monitoring
whereas the technical level is intended for
advanced transformer terminal programming.
Unauthorized access can be prevented with
passwords.
SPA/IEC_103/DNP 3.0/Modbus communication on the rear connector X3.2
The 9-pin D-type subminiature male connector (RS-232 connection) on the rear panel
connects the transformer terminal to the distribution automation system via the SPA bus,
IEC_103, DNP 3.0 or Modbus. The fibreoptic interface module type RER 123 is used
to connect the transformer terminal to the
fibre-optic communication bus for SPA and
7
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
IEC_103 protocols. RS-485 interface module
RER 133 is used to connect the transformer
terminal to the RS-485 communication bus
for DNP 3.0 and Modbus.
LON/SPA bus communication on the rear
connector X3.3
The 9-pin D-type subminiature female connector (RS-485 connection) on the rear panel
connects the transformer terminal to the substation automation system via the SPA bus or
the LON bus. The fibre-optic interface module
type RER 103 is used to connect the transformer terminal to the fibre-optic communication bus. The RER 103 module supports
both SPA bus and LON bus communication.
The SPA-ZC 302 is an interface module that
provides connectivity to the Profibus DP
fieldbus and SPA-ZC 400 interface module
provides connectivity to the IEC 61850-8-1
Station bus.
Transformer
terminal
configuration
The Relay Configuration Tool, based on the
IEC 61131-3 standard and included in the
CAP 505 Relay Product Engineering Tools, is
used for configuring the basic terminal, protection and logic function blocks, control and
measurement functions, timers and other
functional elements included in the logic
functions category.
The programmable system of RET 54_ transformer terminals allows the output contacts to
be operated in accordance with the state of
the logic inputs and the outputs of the protection, control, measurement and condition
monitoring functions. The PLC functions
(e.g. interlocking and alarm logic) are programmed with Boolean functions, timers,
counters, comparators and flip-flops. The
program is written in a graphic function block
diagram language by using the configuration
software.
Mimic configuration with Relay Mimic Editor
The Relay Mimic Editor, which is included in
the CAP 505 Relay Product Engineering
Tools, is used for configuring the graphic display and the alarm channels of the transformer terminal. The mimic configuration
may include circuit breakers, disconnectors,
indicators, measurement data objects and
user-defined texts and explanations. Any configuration can be saved for later use.
8
Self-supervision
The transformer terminal RET 54_ is provided with an extensive self-supervision system. The self-supervision system handles
run-time fault situations and informs the user
of faults via the HMI and LON/SPA bus communication.
When a fault has been detected, the green
Ready indicator starts flashing, a fault indication text is displayed on the HMI and an
event 0/E57 is generated. The fault indication
text on the HMI consists of two rows: a general message ‘internal fault’, followed by the
generated IRF code of the fault.
The relay will try to recover from a fault
either by restarting the module (I/O module
or HMI) that reported the fault, or by restarting the whole relay. During restarting the IRF
state will remain active until the internal selfsupervision program has determined that the
relay is operating normally. If the fault is still
persistent after restarting three times, the
relay will be in permanent IRF state.
All of the eight alarm function blocks can be
configured in the same alarm view of the
mimic editor. ON and OFF state texts (only
one language version at a time can be supported for the alarm) and LED colours can be
defined. Three different colours can be used
to define the ON and OFF state. Three basic
modes are available:
• non-latched
• latched-steady
• latched flashing
Interlocking LED texts can also be defined in
the same alarm view but the colour of the
interlocking LED cannot be changed.
LON network configuration
The LON Network Tool is used for binding
network variables between the transformer
terminal units. Typically, LON horizontal
communication is used for transferring object
status data (open, close, undefined) between
units for interlocking purposes. Additionally,
LON horizontal communication is used to
transfer measured current amplitude and
phase angle information between terminals,
when parallel control with MCC principle is
to be applied.
DNP 3.0 and Modbus configuration
The Protocol Mapping Tool is used for configuring the DNP 3.0 and Modbus interfaces
of the transformer terminal.
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Transformer terminal parameterization
The parameters of the transformer terminal
units can be set either locally over the HMI or
externally via the serial communication using
the Relay Engineering Tools CAP 501/505.
Local parameterization
When the parameters are set locally, the setting parameters can be chosen from the hierarchical menu structure. The desired
language for parameter description can be
selected.
External parameterization
The Relay Setting Tool is used for parameterizing and setting the transformer terminals
externally. The parameters can be set off-line
on a PC and downloaded to the transformer
terminal over a communication port. The
menu structure of the setting tool, including
views for parameterization and settings, is the
same as the menu structure of the transformer
terminal.
Auxiliary
voltage
For its operation, the RET 54_ terminal, including the external display module, requires
a secured auxiliary voltage supply. The terminal’s internal power supply module forms the
voltages required by the terminal electronics.
The power supply module is a galvanically
isolated (fly-back type) dc/dc converter. A
green protection LED indicator on the front
panel is lit when the power supply module is
in operation.
Power supply modules
Terminal
connections
All external circuits are connected to the terminal blocks on the rear panel, see figures
2...4. The terminal block for the measuring
transformers consists of fixed screw terminals.
The serial interface RS-485 on the rear panel
is used for connecting the transformer terminal to the SPA bus or the LON bus. The
SPA/LON bus is connected via a connection
module type RER 103 fitted to the 9-pin Dtype subminiature connector and screwed to
the rear panel.
The serial interface RS-232 on the rear panel
is used for connecting the transformer terminal to the SPA bus, the IEC_103, DNP 3.0 or
Modbus. The SPA/IEC_103 is connected via
a connection module type RER 123 fitted to
the 9-pin D-type subminiature connector and
screwed to the rear panel. DNP 3.0/Modbus
is connected via a connection module, type
RER 133.
There are two basic types of power supply
modules available for the RET 54_: type
PS1/_ and type PS2/_. The operating range of
digital inputs depends on the type of the
power supply module. See Technical data.
The digital input and output contacts of the
transformer terminal are connected to the
multi-pole connectors.
Protective earth is connected to the screw
marked with the earth symbol.
9
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Terminal diagrams
+
PS1_4_ACFail
1
-
2
PS1_4_TempAlarm
X1.1
27
25
24
22
21
19
18
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
100V
1A
5A
1A
5A
1A
5A
100V
1A
5A
1A
5A
1A
5A
1A
5A
Ch 10, VT2
SERIAL BUS
Ch 9, CT7
SERIAL BUS
Ch 8, CT6
X3.2
X3.3
X4.1
3
4
IRF
Ch 7, CT5
X4.1
Mains
Ch 6, VT1
5
6
+
Ch 5, CT4
Ch 4, CT3
PS1_4_HSPO3
7
9
8
PS1_4_HSPO1
PS1_4_TCS1
11
13
12
10
Ch 3, CT2
Ch 2, CT1
TCS
+
15
PS1_4_HSPO2
PS1_4_TCS2
TCS
16
18
17
X4.2
8
-
X4.2
1
2
PS1_4_HSPO4
PS1_4_BI1
-
4
5
PS1_4_BI2
-
6
7
PS1_4_BI3
X5.1
1
2
3
BIO1_5_BI1
-
-
4
5
6
-
7
8
9
-
10
11
12
PS1_4_HSPO5
-
-
13
14
15
16
17
18
PS1_4_SO1
1
2
18
BIO1_5_BI2
BIO1_5_BI3
X5.2
3
BIO1_5_BI4
BIO1_5_BI5
BIO1_5_SO1
BIO1_5_BI7
BIO1_5_SO2
BIO1_5_BI9
BIO1_5_SO3
BIO1_5_BI10
BIO1_5_BI11
BIO1_5_BI12
4
5
6
7
9
BIO1_5_BI8
BIO1_5_SO4
8
10
12
11
13
15
X5.2
-
13
15
14
16
17
BIO1_5_BI6
-
9
11
10
12
BIO1_5_SO5
BIO1_5_SO6
14
16
18
17
RET 541
CD541
Fig. 2
10
Sample connection diagram of RET 541
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
+
PS1_4_ACFail
1
-
2
PS1_4_TempAlarm
X1.1
27
25
24
22
21
19
18
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
100V
1A
5A
1A
5A
1A
5A
100V
1A
5A
1A
5A
1A
5A
1A
5A
Ch 10, VT2
SERIAL BUS
Ch 9, CT7
SERIAL BUS
Ch 8, CT6
X3.2
X3.3
X4.1
3
4
IRF
Ch 7, CT5
X4.1
Mains
Ch 6, VT1
5
6
+
Ch 5, CT4
Ch 4, CT3
PS1_4_HSPO3
7
9
8
PS1_4_HSPO1
PS1_4_TCS1
TCS
11
13
12
TCS
16
18
17
10
Ch 3, CT2
Ch 2, CT1
+
15
PS1_4_HSPO2
PS1_4_TCS2
X4.2
8
-
X4.2
1
2
PS1_4_HSPO4
PS1_4_BI1
-
4
5
PS1_4_BI2
-
6
7
PS1_4_BI3
X5.1
1
2
3
BIO1_5_BI1
-
-
4
5
6
-
7
8
9
PS1_4_HSPO5
-
10
11
12
13
14
15
16
17
18
PS1_4_SO1
1
2
18
BIO1_5_BI2
BIO1_5_BI3
X5.2
3
BIO1_5_BI4
BIO1_5_BI5
BIO1_5_SO1
BIO1_5_BI7
BIO1_5_SO2
BIO1_5_BI9
BIO1_5_SO3
BIO1_5_BI10
BIO1_5_BI11
BIO1_5_BI12
4
5
6
7
9
BIO1_5_BI8
BIO1_5_SO4
8
10
12
11
13
15
X5.2
-
13
15
14
16
17
BIO1_5_BI6
-
9
11
10
12
BIO1_5_SO5
BIO1_5_SO6
14
16
18
17
X7.1
BIO2_7_PO1
17
18
X7.2
X7.1
1
2
3
4
5
6
7
8
9
10
11
12
BIO2_7_BI1
BIO2_7_PO2
1
2
BIO2_7_PO3
4
5
6
BIO2_7_PO4
8
9
10
BIO2_7_PO5
12
13
14
BIO2_7_PO6
16
17
18
3
BIO2_7_BI2
BIO2_7_BI3
7
BIO2_7_BI4
BIO2_7_BI5
BIO2_7_BI6
BIO2_7_BI7
11
BIO2_7_BI8
13
14
BIO2_7_BI9
15
16
BIO2_7_BI10
15
RET 543
CD543
Fig. 3
Sample connection diagram of RET 543
11
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
X4.1
+
PS2_4_ACFail
Mains
-
PS2_4_TempAlarm
X1.1
27
25
24
22
21
19
18
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
100V
Ch 10, VT2
1A
5A
Ch 9, CT7
1A
5A
1A
5A
100V
1A
5A
1A
5A
1A
5A
1A
5A
SERIAL BUS
SERIAL BUS
Ch 8, CT6
2
X3.2
X3.3
X4.1
3
4
IRF
Ch 7, CT5
1
Ch 6, VT1
5
6
+
Ch 5, CT4
Ch 4, CT3
PS2_4_HSPO3
7
9
8
PS2_4_HSPO1
PS2_4_TCS1
11
13
12
10
Ch 3, CT2
Ch 2, CT1
TCS
+
15
PS2_4_HSPO2
PS2_4_TCS2
TCS
16
18
17
X4.2
1
PS2_4_HSPO4
PS2_4_HSPO5
-
-
-
X5.1
1
2
3
4
5
6
7
8
9
PS2_4_HSPO6
BIO1_5_BI1
BIO1_5_BI2
PS2_4_HSPO7
BIO1_5_BI3
-
10
11
12
13
14
15
16
17
18
BIO1_5_BI5
PS2_4_HSPO8
-
10
12
11
13
14
16
15
17
18
X5.2
3
BIO1_5_BI7
BIO1_5_SO1
BIO1_5_BI8
BIO1_5_BI9
BIO1_5_SO2
BIO1_5_BI11
BIO1_5_SO3
BIO1_5_BI12
4
5
6
7
9
BIO1_5_BI10
X5.2
1
2
6
8
7
9
BIO1_5_BI4
BIO1_5_BI6
-
2
4
3
5
BIO1_5_SO4
8
10
12
11
13
15
BIO1_5_SO5
X6.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
BIO1_6_BI1
BIO1_5_SO6
BIO1_6_BI2
BIO1_6_BI3
BIO1_6_SO1
BIO1_6_BI5
BIO1_6_BI6
BIO1_6_SO2
BIO1_6_BI7
BIO1_6_BI8
BIO1_6_SO3
BIO1_6_BI9
BIO1_6_BI10
BIO1_6_SO4
BIO1_6_BI11
BIO1_6_SO5
BIO1_6_BI12
X7.1
4
5
6
7
8
9
10
11
12
17
3
BIO1_6_BI4
BIO1_6_SO6
1
2
3
16
18
X6.2
X6.2
1
2
14
4
5
6
7
9
8
10
12
11
13
15
14
16
18
17
X7.1
BIO2_7_BI1
BIO2_7_PO1
BIO2_7_BI2
BIO2_7_PO2
BIO2_7_BI4
BIO2_7_PO3
BIO2_7_BI6
BIO2_7_BI7
BIO2_7_BI8
BIO2_7_BI9
15
16
BIO2_7_BI10
1
2
3
BIO2_7_BI5
13
14
17
18
X7.2
BIO2_7_BI3
BIO2_7_PO4
BIO2_7_PO5
BIO2_7_PO6
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
RET 545
CD545_b
Fig. 4
12
Sample connection diagram of RET 545
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Technical data
Table 1: General functions available for the RET 54_
Function
Description
INDRESET
Resetting of operation indicators, latched output signals, registers and
waveforms i.e. the disturbance recorder
MMIWAKE
Activation of HMI backlight
SWGRP1
Switchgroup SWGRP1
SWGRP2
Switchgroup SWGRP2
SWGRP3
Switchgroup SWGRP3
......
SWGRP20
Switchgroup SWGRP20
Table 2: Standard functions available for the RET 54_
Function
Description
ABS
Absolute value
ACOS
Principal arc cosine
ADD
Extensible adder
AND
Extensible AND connection
ASIN
Principal arc sine
ATAN
Principal arc tangent
BCD2INT
Type conversion from BCD coded input to SINT (Tap changer)
BITGET
Get one bit
BITSET
Set one bit
BOOL_TO_*
Type conversion from BOOL to WORD / USINT / UINT / UDINT / SINT / REAL
/ INT / DWORD / DINT / BYTE
BOOL2INT
Type conversion from BOOL inputs to INT output
BYTE_TO_*
Type conversion from BYTE to WORD / DWORD
COMH
Hysteresis comparator
COS
Cosine in radians
CTD
Down-counter
CTUD
Up-down counter
CTU
Up-counter
DATE_TO_UDINT
Type conversion from DATE to UDINT
DINT_TO_*
Type conversion from DINT to SINT / REAL / INT
DIV
Divider
DWORD_TO_*
Type conversion from DWORD to WORD / BYTE
EQ
Extensible comparison to equal
EXP
Natural exponential
EXPT
Exponentiation
F_TRIG
Falling edge detector
GE
Extensible comparison to greater or equal
GRAY2INT
Type conversion from GRAY coded input to SINT (Tap changer)
GT
Extensible comparison to greater
INT_TO_*
Type conversion from INT to REAL / DINT
INT2BOOL
Type conversion from INT input to BOOL outputs
LE
Extensible comparison to less or equal
LIMIT
Limitation
LN
Natural logarithm
LOG
Logarithm base 10
LT
Extensible comparison to less
MAX
Extensible maximum
MIN
Extensible minimum
MOD
Modulo
MOVE
Move
13
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 2: Standard functions available for the RET 54_
Function
Description
MUL
Extensible multiplier
MUX
Extensible multiplexer
NAT2INT
Type conversion from natural binary coded input to SINT (Tap changer)
NE
Comparison to greater or less
NOT
Complement
OR
Extensible OR connection
R_TRIG
Rising edge detector
REAL_TO_*
Type conversion from REAL to USINT / UINT / UDINT / SINT / INT / DINT
ROL
Rotate to left
ROR
Rotate to right
RS
Reset dominant bistable function block
RS_D
Reset dominant bistable function block with data input
SEL
Binary selection
SHL
Bit-shift to left
SHR
Bit-shift to right
SIN
Sine in radians
SINT_TO_*
Type conversion from SINT to REAL / INT / DINT
SUB
Subtractor
SQRT
Square root
SR
Set dominant bistable function block
XOR
Extensible exclusive OR connection
TAN
Tangent in radians
TIME_TO_*
Type conversion from TIME to UDINT / TOD / REAL
TOD_TO_*
Type conversion from TOD to UDINT / TIME / REAL
TOF
Off-delay timer
TON
On-delay timer
TP
Pulse
TRUNC_REAL_TO*
Truncation toward zero from REAL to DINT / INT / SINT / UDINT / UINT /
USINT
UDINT_TO_*
Type conversion from UDINT to USINT / UINT / REAL
UINT_TO_*
Type conversion from UINT to USINT / UDINT / REAL / BOOL
USINT_TO_*
Type conversion from USINT to UINT / UDINT / REAL
WORD_TO_*
Type conversion from WORD to DWORD / BYTE
Table 3: Conditioning monitoring functions available for the RET 54_
14
Function
Description
CMBWEAR1
Circuit-breaker electric wear 1
CMBWEAR2
Circuit-breaker electric wear 2
CMCU3
Supervision function of the energizing current input circuit
CMGAS1
Gas pressure monitoring
CMGAS3
Three-pole gas pressure monitoring
CMSCHED
Scheduled maintenance
CMSPRC1
Spring charging control 1
CMTCS1
Trip circuit supervision 1
CMTCS2
Trip circuit supervision 2
CMTIME1
Operate time counter 1 for the operate time used (e.g. motors)
CMTIME2
Operate time counter 2 for the operate time used (e.g. motors)
CMTRAV1
Breaker travel time 1
CMVO3
Supervision function of the energizing voltage input circuit
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 4: Control functions available for the RET 54_
Function
Description
CO3DC1
Three-state disconnector 1 with indication
CO3DC2
Three-state disconnector 2 with indication
COCB1
Circuit breaker 1 control with indication
COCB2
Circuit breaker 2 control with indication
COCBDIR
Direct open for CBs via HMI
CODC1
Disconnector 1 control with indication
CODC2
Disconnector 2 control with indication
CODC3
Disconnector 3 control with indication
CODC4
Disconnector 4 control with indication
CODC5
Disconnector 5 control with indication
COIND1
Switching device 1 indication
COIND2
Switching device 2 indication
COIND3
Switching device 3 indication
COIND4
Switching device 4 indication
COIND5
Switching device 5 indication
COIND6
Switching device 6 indication
COIND7
Switching device 7 indication
COIND8
Switching device 8 indication
COLOCAT
Logic-controlled control position selector
COLTC
On-load tap changer controller (voltage regulator)
COSW1
On/off switch 1
COSW2
On/off switch 2
COSW3
On/off switch 3
COSW4
On/off switch 4
MMIALAR1
Alarm channel 1, LED indicator
MMIALAR2
Alarm channel 2, LED indicator
MMIALAR3
Alarm channel 3, LED indicator
MMIALAR4
Alarm channel 4, LED indicator
MMIALAR5
Alarm channel 5, LED indicator
MMIALAR6
Alarm channel 6, LED indicator
MMIALAR7
Alarm channel 7, LED indicator
MMIALAR8
Alarm channel 8, LED indicator
MMIDATA1
MIMIC data monitoring point 1
MMIDATA2
MIMIC data monitoring point 2
MMIDATA3
MIMIC data monitoring point 3
MMIDATA4
MIMIC data monitoring point 4
MMIDATA5
MIMIC data monitoring point 5
15
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 5: On-load tap changer controller function block
On load tap changer control function (voltage regulator), COLTC
Reference voltage
0.000 ... 2.000 xUn
Delay time for the 1st control pulse
1.0 ... 300.0 s
Delay time for the 2nd control pulse
1.0 ... 300.0 s
Resistive line-drop compens. factor (Ur)
0.0 ... 25.0 %Un
Reactive line-drop compens. factor (Ux)
0.0 ... 25.0 %Un
Load phase angle (in NRP mode)
-89 ... +89 deg
Stability factor in parallel operation
0.0 ... 70.0 %Un
Operation mode
Not in use
Manual
Automatic single
Automatic master
Automatic follower
Negative Reactance Principle
Minimizing Circulating Current
Controlled via op.mode inputs
Delay mode
Definite time
Inverse time
Raise and lower pulse duration
0.5 ... 10.0 s
Bandwith
0.60 ... 9.00 %Un
Overcurrent blocking limit
0.10 ... 5.00 xIn
Undervoltage blocking limit
0.10 ... 1.20 xUn
Overvoltage blocking limit
0.80 ... 1.60 xUn
High circ. current blocking limit
0.10 ... 5.00 xIn
Max limit for LDC term
0.00 ... 2.00 xUn
Reduce Set Voltage step
0.00 ... 9.00 %Un
Max volt tap
-36 ... 36
Min volt tap
-36 ... 36
Max parallel trafos in MCC mode
4
Operation accuracies
- voltage measurement:
- lower and raise output pulse duration:
Depends on the frequency of the voltage measured:
f/fn = 0.95 ... 1.05: +1.0% of the set value or
+0.01xUn
+1% of the set value or +250 ms
250ms and an inaccuracy which occurs when
voltage varies +0.5%
+100 ms
Reset ratio (hysteresis)
20% of the set Bandwith
- operation time DT mode:
- operation time IDMT mode:
Table 6: Measurement function blocks
General measurement/ analog input on RTD/analog module, MEAI1...8
The general measurement function blocks can be used to measure general purpose dc or ac voltage
signals with a sensor input. They also include a REAL type input which can be used to monitor any internal
REAL type IEC 61131-3 based signal, e.g. input data from the RTD/analog module.
GE1…3 (V dc/ac)
General REAL type input
-10000.00000...10000.00000
-10000.00000...10000.00000
Analog output on RTD/analog module, MEAO1...4
The analog output function blocks handle the scaling of any internal REAL type IEC 61131-3 based signal
to fit a selectable 0…20 mA or 4…20 mA range for use with the outputs on the RTD/analog module.
General REAL type input
-10000.00000...10000.00000
Neutral current measurement, MECU1A and MECU1B
Io (A)
Io (%)
16
0.0…20000.0 A
0.0…80.0% In
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase current measurement, MECU3A and MECU3B
IL1
IL2
IL3
IL1
IL2
IL3
IL1 demand
IL2 demand
IL3 demand
IL1 demand
IL2 demand
IL3 demand
0.0…20000.0 A
0.0…20000.0 A
0.0…20000.0 A
0.0…1000.0% In
0.0…1000.0% In
0.0…1000.0% In
0.0…20000.0 A
0.0…20000.0 A
0.0…20000.0 A
0.0…1000.0% In
0.0…1000.0% In
0.0…1000.0% In
Transient disturbance recorder for 16 analog channels, MEDREC16
The transient disturbance recorder MEDREC16 is used for recording the current and voltage waveforms,
as well as the status data of internal IEC 61131-3 based logic signals and digital inputs connected to the
transformer terminals. Maximum 16 analog inputs and 16 logic signal inputs are available. One
fundamental cycle contains 40 samples.
Operation mode
Pre-trg time
Over limit ILx
Over limit Io
Over limit Iob
Over limit Uo
Over limit Ux
Over limit Uxy
Over limit U12b
Over limit ILxb
Under limit Ux
Under limit Uxy
AI filter time
Saturation
Overwrite
Extension
0…100%
0.00…40.00 x In
0.00…40.00 x In
0.00…40.00 x In
0.00…2.00 x Un
0.00…2.00 x Un
0.00…2.00 x Un
0.00…2.00 x Un
0.00…40.00 x In
0.00…2.00 x Un
0.00…2.00 x Un
0.000…60.000 s
The recording can be triggered by any (or several) of the alternatives listed below:
• triggering on the rising or falling edge of any (or several) of the digital inputs
• triggering on overcurrent, overvoltage or undervoltage
• manual triggering via the menu or with the push-button F on the front panel (if configured)
• triggering via serial communication
• periodic triggering
The recording length depends on the number of recordings and inputs used. For example, the following
combination of recording length, number of recordings and number of inputs is available at 50 Hz (60 Hz):
# recordings \ # inputs
1
3
10
1
1163 cyc.
23.3 s (19.4 s)
412 cyc.
8.2 s (6.9 s)
126 cyc.
2.5 s (2.1 s)
5
232 cyc.
4.6 s (3.9 s)
82 cyc.
1.6 s (1.4 s)
25 cyc.
0.5 s (0.4 s)
10
115 cyc.
2.3 s (1.9 s)
41 cyc.
0.8 s (0.7 s)
12 cyc.
0.24 s (0.2 s)
System frequency measurement, MEFR1
Frequency
Average Freq.
Voltage U
10.00…75.00 Hz
10.00…75.00 Hz
0.0…2.0 x Un
17
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase power and energy measurement, MEPE7
P3 (kW)
Q3 (kvar)
Power factor DPF
Power factor PF
P3 demand (kW)
Q3 demand (kvar)
Energy kWh
Reverse kWh
Energy kvarh
Reverse kvarh
-999999…999999 kW
-999999…999999 kvar
-1.00…1.00
-1.00…1.00
-999999…999999 kW
-999999…999999 kvar
0…999999999 kWh
0…999999999 kWh
0…999999999 kvarh
0…999999999 kvarh
Residual voltage measurement, MEVO1A and MEVO1B
Uo
Uo
0…150000 V
0.0…120.0% Un
Three-phase voltage measurement, MEVO3A and MEVO3B
UL1_U12
UL2_U23
UL3_U31
UL1_U12
UL2_U23
UL3_U31
UL1_U12 average
UL2_U23 average
UL3_U31 average
UL1_U12 average
UL2_U23 average
UL3_U31 average
18
0.00…999.99 kV
0.00…999.99 kV
0.00…999.99 kV
0.00…2.00 x Un
0.00…2.00 x Un
0.00…2.00 x Un
0.00…999.99 kV
0.00…999.99 kV
0.00…999.99 kV
0.00…2.00 x Un
0.00…2.00 x Un
0.00…2.00 x Un
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 7: Protection function blocks
Three-phase non-directional overcurrent protection, low-set stages, NOC3Low, 3I>,
NOC3LowB,3I>
Start current
Operate time at DT mode
Time multiplier at IDMT mode
Operation mode
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time:
- Injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode
0.10…5.00 x In
0.05…300.00 s
0.05…1.00
Not in use
Definite time
Extremely inverse
Very inverse
Normal inverse
Long time inverse
RI-type inverse
RD-type inverse
IEEE curves
Peak-to-peak
Fundamental frequency
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x In
>2.0 x start current:
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
< 45 ms
±2% of set value or ±20 ms
Class index E = 5.0 or ±20 ms
Three-phase non-directional overcurrent protection, high-set stage, NOC3High, 3I>>, and
instantaneous stage, NOC3Inst, 3I>>>
Start current
Operate time
Operation mode
0.10…40.00 x In
0.05…300.00 s
Not in use
Definite time
Instantaneous
Measuring mode
Peak-to-peak
Fundamental frequency
0...1000 ms
Drop-off time of the operate time counter
Operation accuracy
Start time:
- injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Note! The values below apply when f/fn = 0.95...1.05
0.1...10 x In: ±2.5% of set value or ±0.01 x In
10...40 x In: ±5.0% of set value
>2.0 x start current:
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
< 45 ms
±2% of set value or ±20 ms
19
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase directional overcurrent function, low-set stage, DOC6Low, I>→
Operation mode
Start current
Operate time
Time multiplier
Basic angle ϕb
Operation direction
Earth-fault protection
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time:
- injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode
Not in use
Definite time
Extremely inverse
Very inverse
Normal inverse
Long-time inverse
RI-type inverse
RD-type inverse
0.05…40.00 x In
0.05…300.00 s
0.05…1.00
0…90°
Forward
Reverse
Disabled
Enabled
Phase-to-phase voltages, peak-to-peak measurement
Phase-to-phase voltages, fundamental freq. measurement
Phase-to-earth voltages, peak-to-peak measurement
Phase-to-earth voltages, fundamental freq. measurement
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
0.1...10 x In: ±2.5% of set value or ±0.01 x In
10...40 x In: ±5.0% of set value
±2.5% of measured voltage or ±0.01 x Un
±2°
>2.0 x start current:
<42 ms
<50 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
< 45 ms
±2% of set value or ±20 ms
Class index E = 5.0 or ±20 ms
Three-phase directional overcurrent function, high-set stage, DOC6High, I>>→, and instantaneous
stage, DOC6Inst, I>>>→
Operation mode
Start current
Operate time
Basic angle ϕb
Operation direction
Earth-fault protection
Non-directional operation (when the direction
cannot be determined)
Measuring mode
Drop-off time of the operate time counter
20
Not in use
Definite time
Instantaneous
0.05…40.00 x In
0.05…300.00 s
0…90°
Forward
Reverse
Disabled
Enabled
Disabled
Enabled
Phase-to-phase voltages, peak-to-peak measurement
Phase-to-phase voltages, fundamental freq. measurement
Phase-to-earth voltages, peak-to-peak measurement
Phase-to-earth voltages, fundamental freq. measurement
0...1000 ms
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Operation accuracy
Start time:
- injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Note! The values below apply when f/fn = 0.95...1.05
0.1...10 x In: ±2.5% of set value or ±0.01 x In
10...40 x In: ±5.0% of set value
±2.5% of measured voltage or ±0.01 x Un
±2°
>2.0 x start current:
<42 ms
<50 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
< 45 ms
±2% of set value or ±20 ms
Three-phase underimpedance protection, low-set stage UI6Low, Z<,
and high-set stage UI6High, Z<<
Z-setting
Operate time
UI6High
Meas. signals (phase selection)
Measuring mode
Operation accuracy
Start time:
- injected impedance
- internal time
- total time
Reset time
Reset ratio
Retardation time
Operate time accuracy
0.01…60.00 p.u.
0.04…300.00 s
Not in use; In use
4 selections for ph-e voltages
7 selections for ph-ph voltages
(depends on the signals available)
Peak-to peak; Fund.freq.
Note! The values below apply when f/fn = 0.95...1.05
± 3.0% of set value or ± 0.02 p.u.
= 0.50 x Z-setting
<42 ms
<50 ms
70...1030 ms (depends on the minimum pulse width set for
the TRIP output)
Typ. 1.03
< 45 ms
± 2% of set value or ± 20 ms
Stabilized and instantaneous differential protection for transformers, Diff6T, 3∆Ι>,3∆Ι>>
Basic setting; the lowest ratio of differential
and nominal current to cause a trip
Starting ratio; slope of the 2nd line of the
operating characteristics
Turn-point 1; turnpoint between the 1st and
2nd line of the operating characteristics
Turn-point 2; turnpoint between the 2nd and
3rd line of the operating characteristics
Tripping value of the instantaneous stage
Operation accuracy
Trip time:
- Injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
5...50%
10...50%
0.5 x In
1.0...3.0 x In
5...30 x In
Note! The values below apply when f/fn = 0.95...1.05
Phase difference measurement: ±4°
Stabilized stage: ±4% of set value or ±2% x In
Instantaneous stage: ±4% of set value or ±2% x In
>2.0 x operating current
<35 ms
<45 ms
60...1020 ms (depends on the minimum pulse width set for
the trip output)
0.98
< 40 ms
21
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Non-directional earth-fault protection, low-set stage, NEF1Low, I0>
Start current
Operate time at DT mode
Time multiplier at IDMT mode
Operation mode
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time:
- Injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode
1.0…100.0% of In
0.05…300.00 s
0.05…1.00
Not in use
Definite time
Extremely inverse
Very inverse
Normal inverse
Long time inverse
RI-type inverse
RD-type inverse
IEEE curves
Peak-to-peak
Fundamental frequency
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value + 0.0005 x In
>2.0 x start current:
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
<45 ms
±2% of set value or ±20 ms
Class index E = 5.0 or ±20 ms
Non-directional earth-fault protection, high-set stage, NEF1High, I0>>, and
instantaneous stage, NEF1Inst, I0>>>
Start current
Operate time
Operation mode
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time:
- Injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
22
0.10…12.00 x In
0.05…300.00 s
Not in use
Definite time
Instantaneous
Peak-to-peak
Fundamental frequency
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or + 0.01 x In
>2.0 x start current
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
< 45 ms
±2% of set value or ±20 ms
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Directional earth-fault protection, low-set stage, DEF2Low, I0>→
Start current
Start voltage
Operate time at DT mode
Time multiplier at IDMT mode
Operation mode
Operation criteria
Operation direction
Basic angle ϕb
Operation characteristic
Intermittent E/F
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
1.0…25.0% of In
2.0…100.0% of Un
0.1…300.0 s
0.05…1.00
Not in use
Definite time
Extremely inverse
Very inverse
Normal inverse
Long time inverse
Basic angle & Uo
Basic angle
IoSin/Cos & Uo
IoSin/Cos
Non-directional Io
Non-directional Uo
Forward
Reverse
-90°
-60°
-30°
0°
IoSin(ϕ)
IoCos(ϕ)
Not active
Active
Peak-to-peak
Fundamental frequency
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value + 0.0005 x In
±2.5% of set value or + 0.01 x Un
Phase angle ±2°
Start time:
- Injected neutral current and residual voltage >2.0 x start current and
residual voltage >2.0 x start voltage
- internal time
<72 ms
- total time
< 80 ms
Reset time
40...1000 ms (depends on the minimum pulse width set for
the trip output)
Reset ratio, typically
0.95
Retardation time
< 50 ms
Operate time accuracy at DT mode
±2% of set value or ±20 ms
Accuracy class index E at IDMT mode
Class index E = 5.0 or ±20 ms
23
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Directional earth-fault protection, high-set stage, DEF2High, I0>>→, and
instantaneous stage, DEF2Inst, I0>>>→
Start current
Start voltage
Operate time
Operation mode
Operation criteria
Operation direction
Basic angle ϕb
Operation characteristic
Intermittent E/F
Measuring mode
Drop-off time of the operate time counter
Operation accuracy
Start time, injected neutral current and
residual voltage
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
1.0…200.0% of In
2.0…100.0% of Un
0.1…300.0 s
Not in use
Definite time
Instantaneous
Basic angle & Uo
Basic angle
IoSin/Cos & Uo
IoSin/Cos
Non-directional Io
Non-directional Uo
Forward
Reverse
-90°
-60°
-30°
0°
IoSin(ϕ)
IoCos(ϕ)
Not active
Active
Peak-to-peak
Fundamental frequency
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value + 0.0005 x In
±2.5% of set value or + 0.01 x Un
Phase angle ±2°
Injected neutral current >2.0 x start current
and residual voltage >2.0 x start voltage
<72 ms
<80 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
<50 ms
±2% of set value or ±20 ms
High-impedance based restricted earth-fault protection, REF1A, ∆I0>
Basic setting; the lowest ratio of differential
and nominal current to cause a trip
Operation accuracy
Trip time
- injected currents
- internal time
- total time
Reset time
Reset ratio
Retardation time
24
0.5...50%
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.004 x In
>2.0 x operating current:
<20 ms
<30 ms
60...1020 ms (depends on the minimum pulse width set for
the trip output)
0.80...0.98
This function block cannot be retarded but trips once the
current exceeds the operate value
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Stabilized restricted earth-fault protection, REF4A, ∆I0> and REF4B, ∆I0>
Basic setting
Operate time
Ratio I2f/I1f>
2nd harmonic blocking
Operation accuracy of differential current
measurement
Operation accuracy of phase angle
measurement
Start time:
-injected currents
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time (Total retardation time when
the current drops below the start value)
Operation time accuracy at definite time
mode
0.5...50%
0.04...300.00 s
10...50 %
Not in use / In use
Note! The values below apply when f/fn = 0.95...1.05
±4% of set value or ±0.02 x In
±2%
>2.0 x operating current:
<30 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.98 (0.90...0.98)
<50 ms
±2% of set value or ±20 ms
Residual overvoltage protection, low-set stage, ROV1Low, U0>
Start voltage
Operate time
Operation mode
Measuring mode
Operation accuracy
Start time:
-injected voltages
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
2.0…20.0% of Un
0.05…300.00 s
Not in use
Definite time
Peak-to-peak
Fundamental frequency
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x Un
>2 x start voltage:
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
Total time for blocking: < 25 ms
Total time when voltage drops below start value: < 50 ms
±2% of set value or ±20 ms
25
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Residual overvoltage protection, high-set stage, ROV1High, U0>>, and
instantaneous stage, ROV1Inst, U0>>>
Start voltage
Operate time
Operation mode
Measuring mode
Operation accuracy
Start time
- injected voltages
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
26
2.0…80.0% of Un
0.05…300.00 s
Not in use
Definite time
Peak-to-peak
Fundamental frequency
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x Un
>2 x start voltage
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.95
Total time for blocking: < 25 ms
Total time when voltage drops below start value: < 50 ms
±2% of set value or ±20 ms
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase thermal overload protection for motors, generators and transformers, TOL3Dev, 3
BASIC SETTINGS:
Starting current of the motor
Max. starting time permitted for the motor
Number of starts allowed from cold state
Type of device to be protected
Trip temperature
Prior alarm temperature
Restart inhibit (temperature limit for
successful restarting)
Ambient temperature
Cooling time-constant
Heating time-constant for generator or
transformer
ADVANCED SETTINGS:
Short time-constant for stator
Long time-constant for stator
Weighting factor of the short time-constant for
stator
Temperature rise of stator at rated current
Maximum temperature of stator
Short time-constant for rotor
Long time-constant for rotor
Weighting factor of the short time-constant for
rotor
Temperature rise of rotor at rated current
Maximum temperature of rotor
Operation mode (principle of ambient
temperature compensation)
Waiting time for a successful restart (Readonly parameter)
Estimated time to the trip (Read-only
parameter)
Operation accuracy
Reset ratio:
- trip
- start
- restart
0.10...10.00 x In
0.1...120.0 s
1...3
Motor; through-ventilated, rated power < 1500 kW
Motor; through-ventilated, rated power > 1500 kW
Motor; surface cooling, rated power < 500 kW
Motor; surface cooling, rated power > 500 kW
Generator; hydro or small air-cooled turbine generators
Generator; large turbine generators
Transformer
80.0…120.0%
40.0…100.0%
40.0…100.0%
-50.0…100.0°C
1.0...10.0 x time constant
1...999 min
0.0...999.0 min
0.0...999.0 min
0.00...1.00
0.0...350.0 °C
0.0...350.0 °C
0.0...999.0 min
0.0...999.0 min
0.00...1.00
0.0...350.0 °C
0.0...350.0 °C
Not in use
No sensors; the set ambient temperature
1 sensor used
2 sensors used
0...86400 s
0...86400 s
Note! The values below apply when f/fn = 0.95...1.05
±1.0%, I = 0.1...10.0 x In
(Calculated temp. rise - 0.1) / Trip temperature
(Calculated temp. rise - 0.1) / Prior alarm temperature
(Calculated temp. rise - 0.1) / Restart inhibit temperature
limit
27
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Negative phase-sequence protection, low-set stage, NPS3Low, I2>, and
high-set stage, NPS3High, I2>>
Operation mode
Start value of negative-sequence current I2
Operate time
Operating characteristic constant K
(corresponds to the machine constant, equal
to the I22t constant of the machine as stated
by machine manufacturer)
Definite start time at inverse-time mode
Definite minimum operate time
Maximum operate time
Cooling time of the machine
Number of phases to be measured
Rotation direction
Drop-off time of the operate time counter
Operation accuracy
Start time:
- injected negative-seq. current
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode,
typically
Not in use
Definite time
Inverse time
0.01...0.50 x In
0.1....120.0 s
5.0...100.0
0.1...60.0 s
0.1...120.0 s
500...10000 s
5...10000 s
2 or 3
Forward
Reverse
0...1000 ms
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x In
= 2.00 x start value
<32 ms
<40 ms
70...1030 ms (depends on the minimum pulse width set for
the trip output)
0.96
<45 ms
±2% of set value or ±20 ms
±2% of the calculated ideal operate time or ±20 ms
Three-phase overvoltage protection, low-set stage, OV3Low, 3U>
Start voltage
Operate time
Time multiplier
Operation mode
Measuring mode
Operation hysteresis
Operation accuracy
Start time:
-injected voltages
- internal time
- total time
Reset time
Reset ratio
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode,
typically
28
0.10…1.60 x Un
0.05…300.0 s
0.05…1.00
Not in use
Definite time
A curve
B curve
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value
= 1.1 x start voltage
<42 ms
<50 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.96 (range 0.95...0.99)
< 50 ms
±2% of set value or ±20 ms
±20 ms
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase overvoltage protection, high-set stage, OV3High, 3U>>
Start voltage
Operate time
Operation mode
Measuring mode
Operation hysteresis
Operation accuracy
Start time:
- injected voltages
- internal time
- total time
Reset time
Reset ratio
Retardation time
Operate time accuracy at DT mode
0.10…1.60 x Un
0.05…300.0 s
Not in use
Definite time
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value
= 1.1 x start voltage
<42 ms
<50 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
0.96 (range 0.95...0.99)
< 50 ms
±2% of set value or ±20 ms
Three-phase undervoltage protection, low-set stage, UV3Low, 3U<
Start voltage
Operate time
Time multiplier
Operation mode
Measuring mode
Operation hysteresis
Operation accuracy
Start time:
- injected voltages
- internal time
- total time
Reset time
Reset ratio
Retardation time
Operate time accuracy at DT mode
Accuracy class index E at IDMT mode,
typically
0.10…1.20 x Un
0.1…300.0 s
0.1…1.0
Not in use
Definite time
C curve
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x Un
<0.5 x start voltage:
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
1.04 (range 1.01...1.05)
< 60 ms
±2.5% of set value
±35 ms
29
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase undervoltage protection, high-set stage, UV3High, 3U<<
Start voltage
Operate time
Operation mode
Measuring mode
Operation hysteresis
Operation accuracy
Start time:
- injected voltages
- internal time
- total time
Reset time
Reset ratio
Retardation time
Operate time accuracy at DT mode
0.10…1.20 x Un
0.1…300.0 s
Not in use
Definite time
Phase-to-phase voltages; peak-to-peak measurement
Phase-to-phase voltages; fundamental freq. measurement
Phase-to-earth voltages; fundamental freq. measurement
1.0...5.0%
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x Un
<0.5 x start voltage:
<32 ms
<40 ms
40...1000 ms (depends on the minimum pulse width set for
the trip output)
1.04 (range 1.01...1.05)
<60 ms
±2.5% of set value
Phase-sequence voltage protection, PSV3St1 and PSV3St2, U1<, U2>, U1>
Start value U2>
Start value U1<
Start value U1>
Operate time U2>
Operate time U1<
Operate time U1>
Operation mode
Rotation direction selection
Operation accuracy
Trip time, U2> operation:
- Injected negative-sequency voltage
- internal time
- total time
Trip time, U1< operation:
- injected positive-sequency voltage
- internal time
- total time
Trip time, U1> operation:
- Injected positive-sequency voltage
- internal time
- total time
Reset time
Reset ratio, typically
Retardation time
Operate time accuracy
30
0.01…1.00 x Un
0.01…1.20 x Un
0.80…1.60 x Un
0.04…60.00 s
0.04…60.00 s
0.04…60.00 s
Not in use; U1< & U2> & U1>; U1< & U2>; U2> & U1>;
U1< & U1>; U2>; U1<; U1>
Forward; Reverse; Input ROT_DIR
Note! The values below apply when f/fn = 0.95...1.05
± 2.5% of set value or ± 0.01 x Un
= 1.1 x start value
<42 ms
<50 ms
= 0.50 x start value
<32 ms
<40 ms
= 1.1 x start value
<42 ms
<50 ms
70...1030 ms (depends on the minimum pulse width
set for the TRIP output)
U2> operation: 0.96
U1< operation: 1.04
U1> operation: 0.99
<45 ms (for all operations)
± 2% of set value or ± 20 ms
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Underfrequency or overfrequency protection, 5 stages, Freq1St1… Freq1St5, f</f>, df/dt
Operation mode
Undervoltage limit for blocking
Start value for under-/overfrequency prot.
Operate time for under-/overfrequency prot.
Start value for df/dt protection
Operate time for df/dt protection
Operation accuracy
- Frequency rate of change (df/dt):
- real df/dt
- real df/dt
- Undervoltage blocking
Start time:
- total start times at fn = 50 Hz:
- frequency measurement
- df/dt measurement
Reset time
Operate time accuracy
Not in use
f</f> 1 timer
f</f> 2 timers
f</f> OR df/dt>
f</f> AND df/dt>
f</f> OR df/dt<
f</f> AND df/dt<
0.30…0.90 x Un
25.00…75.00 Hz
0.10…120.00 s
0.2…10.0 Hz/s
0.12…120.00 s
Under-/overfrequency (f</f>): ±10 mHz
<±5 Hz/s: ±100 mHz/s
<±15 Hz/s: ±2.0% of real df/dt
±1.0% of set value
<100 ms
<120 ms
140...1000 ms (depends on the minimum pulse width set
for the trip output)
±2% of set value or ±30 ms
Overexcitation protection, low-set stage, OE1Low, U/f>, and high-set stage, OE1High, U/f>>
U/f start (DT mode)
U/f start (IDMT mode)
U max cont.
Operate time
k
Maximum time
Constant delay
Cooling time
Operation mode
1.00...2.00 x U/f
1.00...2.00 x U/f
0.80...1.60 x Un
0.10...600.00 s
0.1...100.0
500...10000 s
0.1...120.0 s
5...10000 s
Not in use; Definite time; Curve#1; Curve#2
Operation accuracies
Start time:
- Injected U/f
- internal time
- total time
Reset time
20...40 Hz: ±4% of set value; 40...80 Hz: ±2% of set value
Reset ratio:
- 20...40 Hz
- 40...80 Hz
Retardation time
Operate time accuracy at definite-time mode
Operate time accuracy at inverse-time modes
>2.0 x Un/fn
<60 ms,
<70 ms
100…1060 ms (depends on the set minimum pulse width
for the TRIP output)
typ. 0.99
typ 0.97
<105 ms
20...80 Hz: ±4% of set value or ±40 ms
±100 ms or the accuracy appearing when the measured
voltage varies ±1.0%
31
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Three-phase transformer inrush and motor start-up current detector Inrush3, 3I2f>
Ratio I2f/I1f>
Start current
Operation mode
5…50%
0.10…5.00 x In
Not in use
Inrush mode
Start-up mode
Note! The values below apply when f/fn = 0.95...1.05
Operation accuracy:
- current measurement
- ratio I2f/I1f measurement
Start time:
- internal time
- total time
±2.5% of set value or ±0.01 x In
±5.0% of set value
<32 ms
<40 ms
Fuse failure supervision, FuseFail, FUSEF
Ratio U2/U1>
Ratio I2/I1<
10...50%
10...50%
Operation accuracy:
- when f/fn = 0.98...1.02:
- when f/fn = 0.95...1.05:
- injected negative-sequence voltage
BSOUT activation time:
- f/fn=0.98...1.02
Reset time
Reset ratio:
- for Ratio U2/U1>
- for Ratio I2/I1<
±2.0 percentage units (of settings Ratio U2/U1> and Ratio I2/I1<)
±4.0 percentage units (of settings Ratio U2/U1> and Ratio I2/I1<)
= 2.00 x Ratio U2/U1>
< 35 ms (within the same task and when the task interval is 10 ms)
20 ms (within the same task)
0.8...0.96
1.04...1.2
Table 8: Energizing inputs
Rated frequency
Current inputs
50.0/60.0 Hz
rated current
1 A/5 A
thermal withstand
capability
Voltage inputs
continuously
4 A/20 A
for 1 s
100 A/500 A
dynamic current withstand, half-wave value
250 A/1250 A
input impedance
<100 mΩ/<20 mΩ
rated voltage (parameterization)
100 V/110 V/115 V/120 V
voltage withstand, continuously
2 x Un (240 V)
burden at rated voltage
<0.5 VA
Table 9: Auxiliary power supplies
Type
PS1/240V
(RET 541,
RET 543)
PS2/240V
(RET 545
only)
Input voltage, ac
110/120/220/240 V
-
Input voltage, dc
110/125/220 V
24/48/60 V
Voltage variation
ac 85…110%, dc 80…120%
of rated value
dc 80…120% of rated value
Burden
<50 W
Ripple in dc auxiliary voltage
max. 12% of the dc value
Interruption time in auxiliary dc <40 ms, 110 V and
voltage without resetting
<100 ms, 200 V
Internal overtemperature
indication
32
+78°C (+75…+83°C)
External
display
module
PS1/48V
(RET 541,
RET 543)
PS2/48V
(RET 545
only)
<60 ms, 48 V and
<100 ms, 60 V
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 10: Digital inputs
Power supply version
PS1/240 V (High)
PS1/240 V (Medium),
PS2/240 V
PS1/48 V (Low),
PS2/48V
Input voltage, dc
220 V
110/125/220 V
24/48/60/110/125/
220 V
Nominal treshold voltage, dc
- operating range, dc
155 V
155…265 V
80 V
80...265 V
18 V
18...265 V
Current drain
~2…25 mA
Power consumption/input
<0.8 W
Pulse counting (specific digital inputs), 0…100 Hz
frequency range
Time synchronization (specific digital
inputs) synchronization rate
once per minute or once per second
Table 11: RTD/analog inputs
Supported RTD sensors
100 Ω Platinum
TCR 0.00385 (DIN 43760)
250 Ω Platinum
TCR 0.00385
1000 Ω Platinum
TCR 0.00385
100 Ω Nickel
TCR 0.00618 (DIN 43760)
120 Ω Nickel
TCR 0.00618
250 Ω Nickel
TCR 0.00618
1000 Ω Nickel
TCR 0.00618
10 Ω Copper
TCR 0.00427
120 Ω Nickel
TCR 0.00672 (MIL-T-24388C)
Max lead resistance
200 Ω per lead
(three-wire measurement)
Accuracy
±0.5% of full scale
±1.0% of full scale for 10 Ω Copper RTD
Isolation
2 kV (inputs to outputs and inputs to protective earth)
Sampling frequency
5 Hz
Response time
≤ Filter time + 30 ms (430 ms...5.03 s)
RTD/ Resistance sensing max 4.2 mA RMS
current
6.2 mA RMS for 10 Ω Copper
Current input impedance 274 Ω ±0.1%
Table 12: Analog outputs
Output range
0...20 mA
Accuracy
±0.5% of full scale
Max load
600 Ω
Isolation
2 kV (output to output, output to inputs and output to
protective earth)
Response time
≤ 85 ms
Table 13: Signal outputs
Max system voltage
250 V ac/dc
Continuous carry
5A
Make and carry for 0.5 s
10 A
Make and carry for 3 s
8A
Breaking capacity when control circuit time-constant 1 A/0.25 A/0.15 A
L/R <40 ms, at 48/110/220 V dc
33
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 14: Power outputs
Max system voltage
250 V ac/dc
Continuous carry
5A
Make and carry for 0.5 s
30 A
Make and carry for 3 s
15 A
Breaking capacity when control circuit time constant 5 A/3 A/1 A
L/R <40 ms, at 48/110/220 V dc
Minimum contact load
TCS (Trip Circuit
Supervision)
100 mA, 24 V ac/dc (2.4 VA)
Control voltage range
20…265 V ac/dc
Current drain through the approx. 1.5 mA (0.99…1.72 mA)
supervision circuit
Minimum voltage
20 V ac/dc (15…20 V)
(threshold) over a contact
Table 15: Environmental conditions
Specified service temperature range
-10…+55°C
Transport and storage temperature range
-40…+70°C
Degree of protection by enclosure Front side, flush-mounted
IP 54
Rear side, connection terminals
IP 20
Dry heat test
according to IEC 60068-2-2
Dry cold test
according to IEC 60068-2-1
Damp heat test, cyclic
according to IEC 60068-2-30
r.h. = 95%, T = 20°…55°C
Storage temperature tests
according to IEC 60068-2-48
Table 16: Standard tests
Insulation tests
Mechanical tests
Dielectric test
IEC 60255-5
Test voltage
2 kV, 50 Hz, 1 min.
Impulse voltage test
IEC 60255-5
Test voltage
5 kV, unipolar impulses,
waveform 1.2/50 µs,
source energy 0.5 J
Insulation resistance
measurements
IEC 60255-5
Insulation resistance
> 100 MΩ, 500 V dc
Vibration tests (sinusoidal)
IEC 60255-21-1, class I
Shock and bump test
IEC 60255-21-2, class I
Seismic test
IEC 60255-21-3, class 2
Table 17: Electromagnetic compatibility tests
The EMC immunity test level fulfills the requirements listed below
34
1 MHz burst disturbance test, class common mode
III, IEC 60255-22-1
differential mode
2.5 kV
Electrostatic discharge test, class
III, IEC 61000-4-2 and
IEC 60255-22-2
for contact discharge
6 kV
for air discharge
8 kV
Radio frequency interference test
conducted, common mode
IEC 61000-4-6
10 V (rms), f = 150 kHz…80 MHz
radiated, amplitude-modulated
IEC 61000-4-3
10 V/m (rms),
f = 80…1000 MHz
radiated, pulse-modulated
ENV 50204
10 V/m, f = 900 MHz
radiated, test with a portable
transmitter
IEC 60255-22-3, method C
f = 77.2 MHz, P = 6 W;
f = 172.25 MHz, P = 5 W
1.0 kV
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 17: Electromagnetic compatibility tests
Fast transient disturbance test
(IEC 60255-22-4 and
IEC 61000-4-4)
power supply
4 kV
I/O ports
2 kV
Surge immunity test
(IEC 61000-4-5)
power supply
4 kV, common mode
2 kV, differential mode
I/O ports
2 kV, common mode
1 kV, differential mode
Power frequency (50 Hz) magnetic 100 A/m
field, IEC 61000-4-8
Voltage dips and short
interruptions, IEC 61000-4-11
30%, 10 ms
>90%, 5000 ms
Electromagnetic emission tests
EN 55011 and EN 50081-2
conducted RF emission (mains
terminal)
EN 55011, class A
radiated RF emission
EN 55011, class A
CE approval
Complies with the EMC directive 89/336/EEC and the LV directive
73/23/EEC
Table 18: Data communication
Rear interface, connector X3.1
not used, reserved for future purposes
Rear interface, connector X3.2
RS-232 connection
the fibre-optic interface module RER 123 for SPA and IEC_103
protocol
SPA, IEC_103
RS-485 connection
the RS-485 interface module RER 133 for DNP 3.0 and Modbus
Rear interface, connector X3.3
protocol
DNP 3.0, Modbus
data transfer rates
DNP 3.0 and Modbus:
300 bps...19.2 kbps, selectable
RS-485 connection
LON bus or SPA bus, selectable
the fibre-optic interface module RER 103 is needed for galvanic
isolation
Rear interface, connector X3.4
data transfer rates
SPA bus: 4.8/9.6/19.2 kbps
LON bus: 78.0 kbps/1.2 Mbps
protocol
SPA, LON
RJ45 connection
galvanically isolated RJ45 connection for an external display module
communication cable
Front panel
1MRS 120511.001 (1 m)
1MRS 120511.003 (3 m)
optical connection
protocol
SPA
serial communication cable
1MRS 120511.001 (1 m)
baud rates
4.8/9.6/19.2 kbps
start bits
1
data bits
7
parity
even
stop bits
1
LON protocol
bit rates
78.0 kbps/1.2 Mbps
IEC_103 protocol
baud rates
9.6/19.2 kbps
data bits
8
parity
even
stop bits
1
bit rates
300, 600, 1200, 2400, 4800,
9600, 19200 bps
data bits
8
stop bits
1, 2
parity
none, odd, even
SPA protocol
DNP 3.0
35
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 18: Data communication
Modbus RTU/ASCII
bit rates
300, 600, 1200, 2400, 4800,
9600, 19200 bps
data bits
5, 6, 7, 8
stop bits
1, 2
parity
none, odd, even
Table 19: General
Toolboxes
CAP 501
CAP 505
LNT 505
Event recording
all events are recorded in higher level syntax:
reason, time, date
the last 100 events are recorded
Data recording
records operate values
Protection functions
Control functions
Condition monitoring functions
Measurement functions
see Technical Descriptions of Functions, CD-ROM
(1MRS 750889-MCD)
Self-supervision
RAMs
ROMs
EEPROMs
all analog reference voltages
automatic test sequences for I/Os and HMI modules
output contact condition monitoring (all contacts)
Mechanical dimensions
Width: 223.7 mm (1/2 of a 19” rack)
Height, frame: 265.9 mm (6U)
Height, box: 249.8 mm
Depth: 235 mm
External display module
Weight of the unit
36
~8 kg
Width: 223.7 mm
Height: 265.9 mm
Depth: 74 mm
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Ordering
The following is to be specified when ordering RET 54_ transformer terminals:
• Order number (see figure below)
• Display language combination (e.g.
English-German)
• Quantity of transformer terminals
Each RET 54_ transformer terminal has a
specific order number that identifies the
transformer terminal type as well as the hardware and the software as described in the figure below. The order number is printed on the
marking strip on the front panel of the transformer terminal delivered, e.g. Order No:
RET543AB230AAAA.
RET54_AB230AAAA
A = fixed display, B = external display module
Reserved for future use
Reserved for future use
Auxiliary voltage range of the power supply module and
voltage range of the digital inputs
A: power supply:
PS1/240 V (Medium) or PS2/240 V
Ur = 110/120/220/240 V AC;
110/125/220 V DC
digital inputs:
Ur = 110/125/220 V DC
threshold voltage:
Ut = 80 V DC
B: power supply:
PS1/240 V (High) or PS2/240 V
Ur = 110/120/220/240 V AC;
110/125/220 V DC
digital inputs:
Ur = 220 V DC
threshold voltage:
Ut = 155 V DC
C: power supply:
PS1/48 V (Low) or PS2/48 V
Ur = 24/48/60 V DC
digital inputs:
Ur = 24/48/60/110/125/220 V DC
Hardware number: 230, 231, 232, 233, 234, 235,
240, 241, 242, 243, 244, 245,
250, 251, 252
Functionality level: C = Control, B = Basic, M = Multi
Software revision: A
Transformer terminal type: RET 541, RET 543, RET 545
ret54_ordernumber_
Fig. 5
Order number of RET 54_ transformer terminal.
Language combinations
The display language combination (see table
below) is identified by a three-digit suf-
fix in the software number labelled on the
front panel of the transformer terminal, e.g.
Software 1MRS110028-0_.
Suffix
Language combination
001
English-German
002
English-Swedish
003
English-Finnish
007
English-Portuguese
008
English-Polish
009
English-Russian
010
English-Spanish
Number of digital inputs/outputs
The RET 541, RET 543 and RET 545 transformer terminals differ from each other as to
Number of inputs/outputs
Digital inputs
Trip circuit supervision inputs
Power outputs (NO single-pole)
Power outputs (NO double-pole)
Signal outputs (NO)
Signal outputs (NO/NC)
Self-supervision outputs
RET 541
15
2
0
5
2
5
1
the number of digital inputs and outputs as
follows:
RET 543
25
2
2
9
2
5
1
RET 545
34
2
3
11
4
8
1
37
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Functionality levels
The functionality level determines the extent
of the selection of function blocks available
for the transformer terminal. For more detail-
ed information on the separate function
blocks included in each selection, please consult your relay supplier.
Functionality level
Selection of function blocks
C (Control)
All control1, condition monitoring and measurement functions
B (Basic)
All control1, condition monitoring and measurement functions,
basic protection functions
M (Multi)
All control1, condition monitoring, measurement and
protection functions
1) The COLTC Tap Changer control function block comes as standard in the Control version. In the Basic and the Multi
versions, COLTC is available as an option.
Table 20: Transformer terminal functionality levels
87T
3∆I >, 3∆I >>
51
50 / 51 / 51B
50 / 51B
3I >
3I >>
3I >>>
67
67
67
21G
21G
3I > ->
3I >> ->
3I >>> ->
Z<
Z<<
51N
50N / 51N
50N
67N / 51N
67N
67N
59N
59N
59N
87N
87N
87N
Io > / SEF
Io >>
Io >>>
Io > / SEF ->
Io >> ->
Io >>> ->
Uo >
Uo >>
Uo >>>
∆ Io >
∆ Io >
∆ Io >, REF
49T
46
46
3
I2 >
I2 >>
59
59
27
27
47
47
3U >
3U >>
3U <
3U <<
U1< & U2> & U1>
U1< & U2> & U1>
81U / 81O
81U / 81O
81U / 81O
81U / 81O
81U / 81O
24
24
68
60
62BF
f</
f</
f</
f</
f</
f > / df/dt
f > / df/dt
f > / df/dt
f > / df/dt
f > / df/dt
U/f>
U/f>>
3I2f >
FUSEF
CBFP
3I
3I
Io
Io
3U
3U
Uo
Uo
E / P / Q / pf
f
38
Functions available in RET 541/543/545 Transformer
Terminals. Processor capacity to be checked with "CPU
load" tool
Short circuit and overcurrent
Three-phase differential protection for transformers, stabilized and
instantaneous stages
Three-phase non-directional overcurrent, low-set stage
Three-phase non-dir. overcurrent, high-set stage / blockable overcurrent
Three-phase non-dir. overcurrent, inst. stage / blockable overcurrent
Three-phase non-directional overcurrent function, low-set stage (B)
Three-phase directional o/c, low-set stage
Three-phase directional o/c, high-set stage / blockable overcurrent
Three-phase directional o/c, high-set stage / blockable overcurrent
Three-Phase Underimpedance Protection, Low-Set Stage
Three-Phase Underimpedance Protection, High-Set Stage
Earth-fault
Non-directional earth-fault, low-set stage
Non-directional earth-fault, high-set stage
Non-directional earth-fault, instantaneous stage
Directional earth-fault, low-set stage
Directional earth-fault, high-set stage
Directional earth-fault, instantaneous stage
Residual overvoltage, low-set stage
Residual overvoltage, high-set stage
Residual overvoltage, instantaneous stage
Stabilized restricted earth-fault protection (high voltage side)
Stabilized restricted earth-fault protection (low voltage side)
High-impedance based restricted earth-fault protection
Overload / unbalanced load
Three-phase thermal overload protection
Negative-phase-sequence (NPS) protection, low-set stage
Negative phase sequence (NPS) protection, high-set stage
Over / undervoltage
Three-phase overvoltage, low-set stage
Three-phase overvoltage, high-set stage
Three-phase undervoltage, low-set stage
Three-phase undervoltage, high-set stage
Three-phase phase sequency voltage protection, stage 1
Three-phase phase sequency voltage protection, stage 2
Over/under frequency
Underfrequency or overfrequency inc. rate of change, stage 1
Underfrequency or overfrequency inc. rate of change, stage 2
Underfrequency or overfrequency inc. rate of change, stage 3
Underfrequency or overfrequency inc. rate of change, stage 4
Underfrequency or overfrequency inc. rate of change, stage 5
Over / under excitation
Overexcitation Protection, Low-Set Stage U/f>
Overexcitation Protection, High-Set Stage U/f>>
Additional functions
Three-phase inrush detector
Fuse failure supervision
Circuit breaker failure
Measurement function
Current
Three-phase current
Three-phase current, B -stage
Neutral current
Neutral current, B -stage
Voltage
Three-phase voltage
Three-phase voltage, B -stage
Residual voltage
Residual voltage, B -stage
Energy / Power
Three-phase power and energy (incl. cos ϕ)
Frequency
System frequency
Recording
Transient disturbance recorder
In versions with RTD1 -card
Measurement of RTD/analog -inputs, general measurement
Control of analog -outputs
Code
Diff6T
NOC3Low
NOC3High
NOC3Inst
NOC3LowB
DOC6Low
DOC6High
DOC6Inst
UI6Low
UI6High
REF541/3/5
MULTI
IEC Symbol
RET541/3/5
BASIC
IEEE Code
RET541/3/5
CONTROL
FUNCTIONALITY LEVELS
X
X
X
X
X
X
NEF1Low
NEF1High
NEF1Inst
DEF2Low
DEF2High
DEF2Inst
ROV1Low
ROV1High
ROV1Inst
REF4A
REF4B
REF1A
X
X
X
TOL3Dev
NPS3Low
NPS3High
X
X
X
X
X
X
OV3Low
OV3High
UV3Low
UV3High
PSV3St1
PSV3St2
X
X
X
Freq1St1
Freq1St2
Freq1St3
Freq1St4
Freq1St5
X
OE1Low
OE1High
X
Inrush3
FuseFail
-
MECU3A
MECU3B
MECU1A
MECU1B
MEVO3A
MEVO3B
MEVO1A
MEVO1B
X
X
X
X
X
X
X
X
X
X
X
X
MEPE7
X
X
X
MEFR1
X
X
X
MEDREC16
X
X
X
MEAI1…8
MEAO1…4
X
X
X
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Transformer Terminals functionality levels, cont.
IEEE Code
IEC Symbol
CBCM
CBCM
CBCM
CBCM
CBCM
CBCM
CBCM
CBCM
CBCM
TCS
TCS
MCS
MCS
Condition monitoring function
Circuit breaker
CB electric wear 1
CB electric wear 2
Operation Time Counter 1 (e.g. motors)
Operation Time Counter 2 (e.g. motors)
Gas density supervision
Gas density supervision for three poles
Spring charging control 1
Breaker travel time 1
Scheduled maintenance
Trip circuit
Trip Circuit Supervision 1
Trip Circuit Supervision 2
Measuring circuit
Supervision of the energizing current input circuit
Supervision of the energizing voltage input circuit
Control function
Circuit breakers, disconnectors / earthing switch
Circuit breaker 1, 2 (2 state inputs / 2 control outputs)
Disconnector 1….5 (2 state inputs / 2 control outputs)
Three state disconnector 1, 2 (3 state inputs / 4 control outputs)
Object indication 1…8 (2 state inputs)
MIMIC dynamic data point 1…5 on MMI (single line diagram)
Alarm 1…8 on MMI (alarm view)
On/off switch 1…4 on MMI (single line diagram)
Direct open for CBs via MMI
Logic control position selector
Additional functions
Interlocking
Command control
Standard functions
Operation indication, relay and register reset
Activation of MMI backlight
Switchgroups SWGRP1...SWGRP20
PLC logics (AND, OR, timers etc.) acc. to IEC 1131-3
Data communication
Event to be defined by the customer, E0...E63
SPA bus
LON bus
General functions
Main / secondary setting
Remote setting
Selfsupervision
Annunciating, event generating and value recording
Measurement, parameter and switching device status display
Remote-end binary signal transfer
Binary signal interbay transfer
Code
CMBWEAR1
CMBWEAR2
CMTIME1
CMTIME2
CMGAS1
CMGAS3
CMSPRC1
CMTRAV1
CMSCHED
X
X
X
CMTCS1
CMTCS2
X
X
X
CMCU3
CMVO3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
COCB1...2
CODC1…5
CO3DC1...2
COIND1…8
MMIDATA1…5
MMIALAR1…8
COSW1…4
COCBDIR
COLOCAT
INDRESET
MMIWAKE
SWGRP1....20
EVENT230
-
Options
Dual HMI language, desired language combination must be stated in the purchase order
On-load tap changer controller (voltage regulator), to be ordered as a
COLTC
separate item (1MRS 100144)
O
O
O
X
O
O
RET54_ Functionality2.xls
Hardware versions of RET 541, RET 543 and RET 545
For the number of digital inputs and outputs
of RET 54_ transformer terminals, refer to
section “Order number” above. The number
of matching transformers and analog inputs
and outputs, and the auxiliary voltage range
vary between the different hardware versions
of RET 54_. Moreover, RET 541 and RET
543 can be supplied with an RTD/analog
module. For more detailed information about
the hardware of RET 54_, refer to the tables
20...28 below.
39
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 21: Hardware versions of RET 541, 6I/3U transformers
RET541A_230BAAA
RET541A_230CAAA
RET541A_230AAAB
RET541A_230BAAB
RET541A_233AAAA
RET541A_233BAAA
RET541A_233CAAA
RET541A_233AAAB
RET541A_233BAAB
Order number
RET541A_230AAAA
HW modules
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
1
1
1
1
1
1
1
1
1
1
Analog interface
Current rafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
1
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC /AC (Medium)
1
1
1
1
1
1
1
PS1: 18...80 VDC/AC (Low)
1
1
PS2: 80...265 VDC
PS2: 18...80 VDC
Digital I/O boards
1
BIO1:Threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
1
1
1
1
1
1
BIO1: threshold voltage 18 VDC
1
1
1
BIO2: Threshold voltage 155 VDC
BIO2: threshold voltage 80 VDC
BIO2: threshold voltage 18 VDC
Analog I/O board
RTD/analog module
1
1
1
1
1
1
1 1
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
1
1
1
1
Mechanic
1/2 enclosure
1
1
1
1
1
15
15
Power outputs, single pole
0
0
Power outputs, double pole
5
5
Signal outputs (NO)
2
2
Signal outputs (NO/NC)
5
5
Supervised trip circuits
2
2
IRF outputs
1
1
RTD/analog inputs
0
8
Analog outputs
0
4
Digital inputs
40
1
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 22: Hardware versions of RET 541, 7I/2U transformers
RET541A_231BAAA
RET541A_231CAAA
RET541A_231AAAB
RET541A_231BAAB
RET541A_234AAAA
RET541A_234BAAA
RET541A_234CAAA
RET541A_234AAAB
RET541A_234BAAB
Order number
RET541A_231AAAA
HW modules
7
2
7
2
7
2
7
2
7
2
7
2
7
7
7
7
2
2
2
2
1
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
1
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC /AC (Medium)
1
1
1
1
1
1
1
PS1: 18...80 VDC/AC (Low)
1
1
PS2: 80...265 VDC
PS2: 18...80 VDC
Digital I/O boards
1
BIO1:threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
1
1
1
1
1
1
BIO1: threshold voltage 18 VDC
1
1
1
BIO2: threshold voltage 155 VDC
BIO2: threshold voltage 80 VDC
BIO2: threshold voltage 18 VDC
Analog I/O board
RTD/analog module
1
1
1
1
1
1
1
1
1
1
1
1
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
Mechanic
1/2 enclosure
1
1
1
1
1
1
15
15
Power outputs, single pole
0
0
Power outputs, double pole
5
5
Signal outputs (NO)
2
2
Signal outputs (NO/NC)
5
5
Supervised trip circuits
2
2
IRF outputs
1
1
RTD/analog inputs
0
8
Analog outputs
0
4
Digital inputs
41
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 23: Hardware versions of RET 541, 8I/1U transformers
RET541A_232BAAA
RET541A_232CAAA
RET541A_232AAAB
RET541A_232BAAB
RET541A_235AAAA
RET541A_235BAAA
RET541A_235CAAA
RET541A_235AAAB
RET541A_235BAAB
Order number
RET541A_232AAAA
HW modules
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
1
1
1
1
1
1
1
1
1
1
1
Analog interface
Current rafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
1
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC /AC (Medium)
1
1
1
1
1
1
1
PS1: 18...80 VDC/AC (Low)
1
1
PS2: 80...265 VDC
PS2: 18...80 VDC
Digital I/O boards
1
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
1
1
1
1
1
1
BIO1: threshold voltage 18 VDC
1
1
1
BIO2: threshold voltage 155 VDC
BIO2: threshold voltage 80 VDC
BIO2: threshold voltage 18 VDC
Analog I/O board
RTD/analog module
1
1
1
1
1
1
1
1
1
1
1
1
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
Mechanic
1/2 enclosure
1
1
1
1
1
15
15
Power outputs, single pole
0
0
Power outputs, double pole
5
5
Signal outputs (NO)
2
2
Signal outputs (NO/NC)
5
5
Supervised trip circuits
2
2
IRF outputs
1
1
RTD/analog inputs
0
8
Analog outputs
0
4
Digital inputs
42
1
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 24: Hardware versions of RET 543, 6I/3U transformers
RET543A_240BAAA
RET543A_240CAAA
RET543A_240AAAB
RET543A_240BAAB
RET543A_243AAAA
RET543A_243BAAA
RET543A_243CAAA
RET543A_243AAAB
RET543A_243BAAB
Order number
RET543A_240AAAA
HW modules
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
6
3
1
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
1
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC/AC (Medium)
1
1
1
1
1
1
PS1: 18...80 VDC/AC (Low)
1
1
1
PS2: 80...265 VDC
PS2: 18...80 VDC
Digital I/O boards
1
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
1
1
1
1
1
BIO2: threshold voltage 155 VDC
1
1
1
1
1
1
1
1
BIO2: threshold voltage 18 VDC
1
1
1
BIO1: threshold voltage 18 VDC
BIO2: threshold voltage 80 VDC
1
1
1
Analog I/O board
RTD/analog module
1
1
1
1
1
1
1
1
1
1
1
1
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display external
1
1
1
1
Mechanic
1/2 enclosure
1
1
1
1
1
1
25
25
Power outputs, single pole
2
2
Power outputs, double pole
9
9
Signal outputs (NO)
2
2
Signal outputs (NO/NC)
5
5
Supervised trip circuits
2
2
IRF outputs
1
1
RTD/analog inputs
0
8
Analog outputs
0
4
Digital inputs
43
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 25: Hardware versions of RET 543, 7I/2U transformers
RET543A_241BAAA
RET543A_241CAAA
RET543A_241AAAB
RET543A_241BAAB
RET543A_244AAAA
RET543A_244BAAA
RET543A_244CAAA
RET543A_244AAAB
RET543A_244BAAB
Order number
RET543A_241AAAA
HW modules
7
2
7
2
7
2
7
2
7
2
7
2
7
2
7
2
7
2
7
2
1
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
1
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC/AC (Medium)
1
1
1
1
1
1
1
PS1: 18...80 VDC/AC (Low)
1
1
PS2: 80...265 VDC
PS2: 18...80 VDC
Digital I/O boards
1
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
1
1
1
1
1
BIO2: threshold voltage 155 VDC
1
1
1
1
1
1
1
1
BIO2: threshold voltage 18 VDC
1
1
1
BIO1: threshold voltage 18 VDC
BIO2: threshold voltage 80 VDC
1
1
1
Analog I/O board
RTD/analog module
1
1
1
1
1
1
1
1
1
1
1
1
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
Mechanic
1/2 enclosure
1
1
1
1
1
25
25
Power outputs, single pole
2
2
Power outputs, double pole
9
9
Signal outputs (NO)
2
2
Signal outputs (NO/NC)
5
5
Supervised trip circuits
2
2
IRF outputs
1
1
RTD/analog inputs
0
8
Analog outputs
0
4
Digital inputs
44
1
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 26: Hardware versions of RET 543, 8I/1U transformers
RET543A_242BAAA
RET543A_242CAAA
RET543A_242AAAB
RET543A_242BAAB
RET543A_245AAAA
RET543A_245BAAA
RET543A_245CAAA
RET543A_245AAAB
RET543A_245BAAB
Order number
RET543A_242AAAA
HW modules
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
8
1
1
1
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
1
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC/AC (Medium)
1
1
1
1
1
1
1
PS1: 18...80 VDC/AC (Low)
1
1
PS2: 80...265 VDC
PS2: 18...80 VDC
Digital I/O boards
1
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
1
1
1
1
1
BIO2: threshold voltage 155 VDC
1
1
1
1
1
1
1
1
BIO2: threshold voltage 18 VDC
1
1
1
BIO1: threshold voltage 18 VDC
BIO2: threshold voltage 80 VDC
1
1
1
Analog I/O board
RTD/analog module
1
1
1
1
1
1
1
1
1
1
1
1
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display external
1
1
1
1
Mechanic
1/2 enclosure
1
1
1
1
1
1
25
25
Power outputs, single pole
2
2
Power outputs, double pole
9
9
Signal outputs (NO)
2
2
Signal outputs (NO/NC)
5
5
Supervised trip circuits
2
2
IRF outputs
1
1
RTD/analog inputs
0
8
Analog outputs
0
4
Digital inputs
45
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 27: Hardware versions of RET 545, 6I/3U transformers
RET545A_250BAAA
RET545A_250CAAA
RET545A_250AAAB
RET545A_250BAAB
Order number
RET545A_250AAAA
HW modules
6
3
6
3
6
3
6
3
6
3
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC/AC (Medium)
PS1: 18...80 VDC/AC (Low)
PS2: 80...265 VDC
1
PS2: 18...80 VDC
Digital I/O boards
2
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
2
2
BIO1: threshold voltage 18 VDC
1
BIO2: threshold voltage 155 VDC
BIO2: threshold voltage 80 VDC
2
2
1
1
1
1
BIO2: threshold voltage 18 VDC
Analog I/O board
RTD/analog module
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
Mechanic
1/2 enclosure
Digital inputs
46
1
1
1
34
Power outputs, single pole
3
Power outputs, double pole
11
Signal outputs (NO)
4
Signal outputs (NO/NC)
8
Supervised trip circuits
2
IRF outputs
1
RTD/analog inputs
0
Analog outputs
0
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 28: Hardware versions of RET 545, 7I/2U transformers
RET545A_251BAAA
RET545A_251CAAA
RET545A_251AAAB
RET545A_251BAAB
Order number
RET545A_251AAAA
HW modules
7
2
7
2
7
2
7
2
7
2
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC/AC (Medium)
PS1: 18...80 VDC/AC (Low)
PS2: 80...265 VDC
1
PS2: 18...80 VDC
Digital I/O boards
2
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
2
2
BIO1: threshold voltage 18 VDC
1
BIO2: threshold voltage 155 VDC
BIO2: threshold voltage 80 VDC
2
2
1
1
1
1
BIO2: threshold voltage 18 VDC
Analog I/O board
RTD/analog module
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
Mechanic
1/2 enclosure
Digital inputs
1
1
1
34
Power outputs, single pole
3
Power outputs, double pole
11
Signal outputs (NO)
4
Signal outputs (NO/NC)
8
Supervised trip circuits
2
IRF outputs
1
RTD/analog inputs
0
Analog outputs
0
47
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 29: Hardware versions of RET 545, 8I/1U transformers
RET545A_252BAAA
RET545A_252CAAA
RET545A_252AAAB
RET545A_252BAAB
Order number
RET545A_252AAAA
HW modules
8
1
8
1
8
1
8
1
8
1
1
1
1
1
1
1
1
1
1
Analog interface
Current trafo 1/5 A
Voltage trafo 100 V
Main processor boards
CPU module
Power supply boards
PS1: 80...265 VDC/AC (High)
PS1: 80...265 VDC/AC (Medium)
PS1: 18...80 VDC/AC (Low)
PS2: 80...265 VDC
1
PS2: 18...80 VDC
Digital I/O boards
2
BIO1: threshold voltage 155 VDC
BIO1: threshold voltage 80 VDC
2
2
BIO1: threshold voltage 18 VDC
1
BIO2: threshold voltage 155 VDC
BIO2: threshold voltage 80 VDC
2
2
1
1
1
1
BIO2: threshold voltage 18 VDC
Analog I/O board
RTD/analog module
Display boards
Graphic HMI display, fixed
1
1
1
Graphic HMI display, external
1
1
1
1
Mechanic
1/2 enclosure
Digital inputs
48
1
1
1
34
Power outputs, single pole
3
Power outputs, double pole
11
Signal outputs (NO)
4
Signal outputs (NO/NC)
8
Supervised trip circuits
2
IRF outputs
1
RTD/analog inputs
0
Analog outputs
0
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Software configuration
Each RET 54_ transformer terminal allows
various software configurations based on separate functions. Functions included in the
selected functionality level can be activated
within the scope of the I/O connections and
considering the total CPU load of the functions.
Parts and
assembly
descriptions
To achieve the best possible operation accuracy, all parts of a RET 54_ product have
been calibrated together. Thus, each product
forms a whole for which no separate spare
parts can be supplied. In the event of malfunction, please consult your transformer terminal supplier.
49
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
RET/1U
Application
examples
MF
RET/4I
Q
p>
3DI>
87TG
3I>
HV
51
50
3
HV
49T
3I>
LV
51
50
I2>
46
I0>
HV
51N
50N
3I2f>
68
CBFP 62BF
LV
RET/RTD
Q
RET 54_
RET/1U
3I>
51
50
CBFP 62BF
REF/3I, REA 101/3I
RET/31
CBFP 62BF
HV
3U>
59
3U<
27
U0>
59N
000
000
U
3I
Io
Q
P
3I
U
TO
Tw
R
TCS
CBCM
000
3I>
&
3I
R
3U
Q
P
TCS
REA 101
E
MF
REF/3U
REF/1U
REF 54_
Yd transformer
Fig. 6
50
Protection, control and supervision functions of a Yd-connected power transformer, implemented
with RET 543 transformer terminal, REF543 feeder terminal and REA 101 arc protection. Position
indication of the on-load tap changer is used to increase the sensitivity of the differential function of
the transformer. In this example, the voltage controller is not included in the RET 543 transformer
terminal.
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
MF
RET/3I
REF/4I
p>
Q
RET/1I
REF/1I
Q
RET/RTD
3DI>
87T
3I>
HV
51
50
DI0>
LV
87TN
3I>
LV
51
50
3
49T
I 0>
HV
51N
50N
I2>
HV
46
I0>
LV
51N
50N
3I2f >
HV
68
CBFP 62BF
HV
I0
3I
U
3I
R
I0
o
o
TO
Tw
TCS
U
U
CBFP 62BF
LV
RET 54_
000
000
3I>
51
50
I0>
51N
50N
LO
86
3I
I0
000
R
TCS
CBFP 62BF
REF 610
90
RET/1U
REF/3U
REF/3I
3I>
51
50
3U>
59
I0>
51N
50N
3U<
27
RET/3I
CBFP 62BF
000
3I
I0
R
3U
P
Q
TCS
REF 54_
MF
Dyn-trafo_impEarthedLVn
Fig. 7
Protection, control, measurement and supervision functions of an Dyn-connected power transformer, implemented with RET 543 transformer terminal and an REF 543 feeder terminal. The
neutral point of the low-voltage network is earthed via a high impedance. REF 610 is used as a
backup relay on the high-voltage side. This sceme can be applied also for parallel connected
transformers.
51
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
M
REF/3U
REF/3U
M
MF
3I>
51
50
3U>
59
3I 2f >
68
3U<
27
I 0>
51N
50N
RET/3I
000
I0
3I
R
3U
TCS
CBFP 62BF
REF/3I
REF 54_
M
RET/1I
REF/1I
M
M
Θ
Θ
P>
M
M
RET/1U
REF/1I
3I>
HV
51
50
∆I0>
HV
87TN
3I>
LV
51
50
3I
I0
∆I0>
LV
87TN
I 0>
HV
51N
50N
3I
U
3
49T
I 0>
LV
51N
50N
3I 2f >
HV
68
RET/3I
R
I0
TO
Tw
CBFP 62BF
LV
67
3U>
59
I 0>
51N
50N
3U<
27
CBFP 62BF
f>
81O
df/dt 81O-R
TCS
U
CBFP 62BF
HV
3I>
REF,REA/3I
RET/1I
000
87T
RET 54_
M
000
3∆I>
U
90
000
3I>
&
3I
I0
3U
pf
Q
P
3I-harm
R
TCS
REA 101
f
REF/3U
REF/3U
3U-harm
REF 54_
MF
M
E
M
YNd transformer with earthing transformer on LV side
Fig. 8
52
Protection, control, measurement and supervision functions of a YNd-connected power transformer, implemented with an RET 543 transformer terminal, REF 543 feeder terminals and REA
101 arc protection. The low-voltage network is earthed via a zig-zag earthing transformer.
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
MF
REF/3U
M
REF/3U
M
3I>
51
50
3U>
59
3I 2f >
68
3U<
27
I0>
51N
50N
RET/3I
REF/3I
000
3I
I0
R
3U
TCS
CBFP 62BF
REF 54_
M
Θ
REF/1I
P> Θ
M
RET/RTD
3I>
HV
51
50
∆I0 > 87TN
HV
3I>
LV
51
50
3I
I0
∆I0>
LV
87TN
I0>
HV
51N
50N
3I
U
3
49T
I0>
LV
51N
50N
3I 2f >
HV
68
R
I0
REF/1I
RET/1I
TO
Tw
REF/3U
RET/1U
3I>
67
3U>
59
I0>
51N
50N
3U<
27
TCS
U
CBFP 62BF
LV
CBFP 62BF
HV
RET 54_
REF, REA/3I
000
000
3∆I > 87T
RET/1I
U
90
000
3I>
&
RET/3I
MF
CBFP 62BF
REF 54_
f>
81O
df/dt 81O-R
3I
I0
3U
pf
R
TCS
f
REA 101
CBCM
E
MCS
YNyn transformers impedance earthed LV neutral
Fig. 9
Protection, control, measurement and supervision functions of YNyn-connected power transformers, implemented with RET 543 transformer terminals, REF 543 feeder terminals and REA 101 arc
protection. The neutral point of the low-voltage network is earthed via a low resistance. The
scheme is also applicable to other types of low-impedance earthed networks, where the neutral
point is earthed effectively or via a low reactance. This sceme can be applied also for parallel connected transformers.
53
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
3U<
27
3U>
59
U0 >
59N
3U
U0
000
RET/2U (Multi)
REX/3U
REX/1U
M
MF
CBCM
R
TCS
RET/4I (Basic)
MCS
RET/3I (Multi)
REX 521 H06
M
M
Q
p>
M
Q
RET/1I (Basic)
REF/1I
81O
81O-R
f<
df/dt
81U
81U-R
U/f>
24
CBFP 62BF
HV
Z<
21
CBFP 62BF
LV
U<
27
I0>
HV
51N
50N
3I
I0
DI0 >
LV
87TN
I0>
LV
51N
50N
3I
I0
3I>
HV
51
50
3
49T
3I>
LV
51
50
3I2f >
HV
68
000
R
TCS
REF/3I, REA 101/3I
R
U
f
TO
TTC
U
U
RET 54_ (Multi)
3I>
51
50
3U>
59
I0>
51N
50N
3U<
27
CBFP 62BF
U0>
59N
000
3I
3U
3I>
&
I0
R
TCS
REA 101
REF/3U
RET/3I (Basic)
000
000
T
RET 54_ (Basic)
RET/1U (Multi)
MF
f>
df/dt
3DI > 87TG
REF 54_
Yyn-trafo_highresEarthedLV
Fig. 10
54
Protection, control, measurement and supervision functions of an Yyn-connected industrial power
transformer, implemented with RET 543 transformer terminals, an REF 543 feeder terminal, an
REX 521 protection relay and REA 101 arc protection. The neutral point of the low-voltage network
is earthed via a high resistance.
Transformer Terminal
RET 541, RET 543, RET 545
MF
REX521/1U
REX521/3U
1MRS755543
RET_/3I
3DI>
87TG
3I>
HV
51
50
DI0>
LV
87TN
3I>
LV
51
50
3I
I0
3
49T
I0>
HV
51N
50N
3I
U
I0>
LV
51N
50N
I2>
HV
46
CBFP 62BF
HV
RET_/1I
000
R
TCS
I0
o
Q
P>
REM_/3I
REM_/3U
REM_/1U
G
3~
REM/RTD
REM_/3I
RET_/3I
27
3U>
59
U0>
59N
f>
81U
o
TO
Tw
3U
U0
000
f
CBCM
R
TCS
MCS
REX 521 H06
RET 54_
Q
3U<
000
3DI>
87G
X<
40
3I>
51
50
P>
32
3I
P
I(U)>
51V
I2>
46
Q
U
I0>
50N
51N
3
49G
U0
pf
TCS
o
MCS
3U>
59
3U<
27
U 0>
59N
T
f
F
60
Q>
49
38
R
E
CBFP 62BF
REM 54_
gener_blockconn-trafo1
Fig. 11
Transformer in block connection with a generator. The transformer terminal RET 543 is used for
overall differential protection. An earthing resistor is recommended for the generator. The REX 521
protection relay is used for abnormal voltage and frequency supervision and protection of the network and the machine.
55
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
3DI> 87TG
MF
RET_/3I
RET_/1U
RET_/1U
51
3I>
HV
50
000
DI0 >
LV
87TN
3I>
LV
51
50
3I
3
49T
I0>
HV
51N
50N
3I
46
I0>
LV
51N
50N
U>
59N
I2>
HV
RET_/1I
I0
R
U
TCS
I0
o
o
TO
Tw
CBFP 62BF
RET 54_
Q
Q
P>
REM_/3I (A)
REM_/3I (B)
REM_/2U(A)/3U(B)
REM_/1U (A)
3DI>
87G
f>/f<
81O
81U
Ios>
64S
X<
40
P>
32
I>
2
46
CBFP 62BF
000
3I
P
Q
U
f
pf
R
TCS
MCS
E
G
3~
REM_/3I (A)
RET_/3I
REK 510
REM/I0R
(B)
REM_/1I (A)
REM 54_ (A)
3I>
51
50
P>
32
Z<
21G
3
49G
3I
P
U/f>
24
F
60
Q
3U
IOR >
64R
3U>
59
U0
pf
3U<
27
CBFP 62BF
U0 >
59N
000
R
TCS
MCS
f
E
REM 54_ (B)
gen_blockconn-trafo2
Fig. 12
56
Transformer in block connection with a generator. The transformer terminal RET 543 is used for
overall differential protection. An earthing resistor is recommended for the generator. Generator
protection functions are divided for two REM 543 machine terminals (A and B). The current injection device REK 510 is used in the rotor earth-fault protection scheme.
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
3I >
3I>
I0>
50/51
67
= multiple-stage three-phase overcurrent protection, double low-set, high-set
and instantaneous stages available (NOC3_)
= multiple-stage three-phase directional overcurrent protection, low-set, high-set and
instantaneous stage available (DOC6_)
50N/51N = multiple-stage earth-fault protection, low-set, high-set and instantaneous stage
available (NEF1_)
I2 >
46
= negative phase sequence (NPS) protection,
low-set and high-set stages available (NPS3_)
3I2f >
68
= inrush detection based on the 2nd harmonic content of phase currents, applied for
preventing possible unnecessary operation of overcurrent or earth-fault protection
during transformer switching-in or to start cold load pick-up logic (Inrush3_)
3D I >
87T
3D I >
87TG
= overall differential protection for generator and transformer blocks, stabilized and
instantaneous stages (Diff6T)
DI0>
87TN
= restricted earth-fault (REF) protection, low- or high-impedance type (Diff3)
I(U)>
51V
= voltage-dependent overcurrent protection, low-set and high-set stages
available (VOC6_)
I 0S>
64S
= stator earth-fault protection (NEF1_)
I 0R>
64R
= rotor earth-fault protection (NEF1_)
U/f
24
= overexcitation protection, low-set and high-set stages available (OE1_)
U<
27
= undervoltage protection, low-set and high-set stage available (UV3_)
3U <
27
= three-phase undervoltage protection, low-set and high-set stage available (UV3_)
3U >
59
= three-phase overvoltage protection, low-set and high-set stage available (OV3_)
U0>
59N
= multiple-stage residual overvoltage protection, low-set, high-set and instantaneous
stage available (ROV1_)
f>
81U
= overfrequency protection (incl. in Freq1St_)
f>
df/dt
81U
= overfrequency protection and frequency rate of change function (incl. in Freq1St_)
81U-R
f<
df/dt
81O
= underfrequency protection and frequency rate of change function (incl. in Freq1St_)
81O-R
f>/f<
81O
81U
= over/underfrequency protection (incl. in Freq1St_)
3
49G
= three-phase thermal overload protection for generator (TOL3Dev)
3
49T
= three-phase thermal overload protection for transformers (TOL3Dev)
Q>
49
38
= thermal supervision for generator windings and bearings with RTDs (MEAI_)
62BF
= circuit-breaker failure protection (included in all current-based
short circuit and earth-fault protection function blocks)
CBFP
= three phase differential protection for transformers, stabilized and instantaneous
stages (Diff3)
SYMNOT1_RET
Fig. 13
Symbol notations, part I
57
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Z<
21G
= underimpedance protection for generator, low-set and high-set stages
(UI6_)
3Z<
21
= three-phase underimpedance protection, low-set and high-set stages
(UI6_)
X<
40
= underexcitation protection, low-set and high-set stages
(UE6_)
P>
32
F
= underpower, low-forward power or reverse power protection,
stages 1, 2 and 3 available (UPOW6St_)
60
= fuse failure supervision (FuseFail)
3I >
&
= arc protection with REA 101
MCS
= measuring circuit supervision
TCS
= trip circuit supervision
CBCM
U
U
= circuit-breaker condition monitoring
90V
= automatic voltage regulation (COLTC)
= manual voltage regulation (COLTC)
P
= active power measurement, indication and supervision
Q
= reactive power measurement, indication and supervision
3I
= 3-phase current measurement, indication and supervision
3U
= 3-phase voltage or phase-to-phase voltage measurement, indication
and supervision
f
= frequency measurement, indication and supervision
pf
= power factor measurement, indication and supervision
I0
= residual current measurement, indication and supervision
U0
= residual voltage measurement, indication and supervision
SYMNOT2_RET
Fig. 14
58
Symbol notations, part II
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
U
= phase voltage or phase-to-phase voltage measurement, indication
and supervision
oT
= oil temperature measurement, indication and supervision
o
oT
W
= transformer winding temperature measurement, indication
and supervision
oT
TC
= tap changer temperature measurement, indication
and supervision
oT
= ambient temperature measurement, indication and supervision
= energy counter, forward or reverse active / reactive
energy (MEPE7)
E
3I-harm
= current waveform distortion measurement (PQCU3H)
3U-harm
= voltage waveform distortion measurement (PQVU3H)
= annunciating, event generating and value recording functions
R
= disturbance recorder (MEDREC16)
000
= digital value indication
000
= HMI/MIMIC display
000
= tap changer position display
0
I
= local and remote control interface
= bay-oriented interlocking logic
SYMNOT3_RET
Fig. 15
Symbol notations, part III
59
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Application selection tables for RET 541, RET 543 and RET 545
functions
Table 30: Protection functions
Types of fault
IEEE Device No.
IEC Symbol
Protection function
Function block
code
Differential
protection
87T
3∆I>, 3∆I>>
Stabilized and
instantaneous differential
protection for
transformers
Diff6T
Short circuit and
overcurrent
51
3I>
Three-phase nondirectional overcurrent,
low-set stage
NOC3Low
51
3I>
Three-phase nondirectional overcurrent,
low-set stage
NOC3LowB
50/51/51B
3I>>
Three-phase nondirectional overcurrent,
high-set stage
NOC3High
50/51B
3I>>>
Three-phase nondirectional overcurrent,
instantaneous stage
NOC3Inst
67
3I>→
Three-phase directional
o/c, low-set stage
DOC6Low
67
3I>>→
Three-phase directional
o/c, high-set stage
DOC6High
67
3I>>>→
Three-phase directional
o/c, instantaneous stage
DOC6Inst
21
Z<
Three-phase
underimpedance,low-set
stage
UI6Low
21
Z<<
Three-phase
underimpedance, highset stage
UI6High
51N
Io>/SEF
Non-directional earthfault, low-set stage (or
SEF = sensitive earthfault protection)
NEF1Low
50N/51N
Io>>
Non-directional earthfault, high-set stage
NEF1High
50N
Io>>>
Non-directional earthNEF1Inst
fault, instantaneous stage
67N/51N
Io>→/SEF
Directional earth-fault,
low-set stage (or SEF =
sensitive earth-fault
protection)
DEF2Low
67N
Io>>→
Directional earth-fault,
high-set stage
DEF2High
67N
Io>>>→
Directional earth-fault,
instantaneous stage
DEF2Inst
59N
Uo>
Residual overvoltage,
low-set stage
ROV1Low
59N
Uo>>
Residual overvoltage,
high-set stage
ROV1High
59N
Uo>>>
Residual overvoltage,
instantaneous stage
ROV1Inst
87N
∆Io>
High-impedance based
restricted earth-fault
protection
REF1A
Underimpedance
Earth fault
60
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 30: Protection functions
Types of fault
IEEE Device No.
IEC Symbol
Protection function
Function block
code
Earth-fault
87TN
∆Io>
Stabilized restricted
earth-fault protection
REF4A
87TN
∆Io>
Stabilized restricted
earth-fault protection
REF4B
Overload
49M/49G/49T
3
Three-phase thermal
protection for devices
(motors, generators and
transformers)
TOL3Dev
Negative phaseseguence
46
I2 >
Negative phaseseguence protection,
low-set stage
NPS3Low
46
I2>>
Negative phaseseguence protection,
high-set stage
NPS3High
59
3U>
Three-phase
overvoltage, low-set
stage
OV3Low
59
3U>>
Three-phase
overvoltage, high-set
stage
OV3High
27
3U<
Three-phase
undervoltage, low-set
stage
UV3Low
27
3U<<
Three-phase
undervoltage, high-set
stage
UV3High
27, 47, 59
U1<
U2>
U1>
Phase-sequence voltage
protection, stage 1
PSV3St1
27, 47, 59
U1<
U2>
U1>
Phase-sequence voltage
protection, stage 2
PSV3St2
81U/81O
f</f>, df/dt
Underfrequency or
overfrequency, stage 1
(incl. rate of change)
Freq1St1
81U/81O
f</f>, df/dt
Underfrequency or
overfrequency, stage 2
(incl. rate of change)
Freq1St2
81U/81O
f</f>, df/dt
Underfrequency or
overfrequency, stage 3
(incl. rate of change)
Freq1St3
81U/81O
f</f>, df/dt
Underfrequency or
overfrequency, stage 4
(incl. rate of change)
Freq1St4
81U/81O
f</f>, df/dt
Underfrequency or
overfrequency, stage 5
(incl. rate of change)
Freq1St5
24
U/f>
Overexcitation protection, OE1Low
low-set stage
24
U/f>>
Overexcitation protection, OE1High
high-set stage
68
3I2f>
Three-phase transformer Inrush3
inrush and motor start-up
current detector
60
FUSEF
Fuse failure supervision
Overvoltage/
undervoltage
Overfrequency/
underfrequency
Overexcitation
Additional functions
FuseFail
61
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 31: Measurement functions
Types of measurement
IEC Symbol
Measurement function
Function block code
General measurement/
analog input or analog
output
mA/V/°C/Ω
General measurement/
analog input on
RTD/analog module
MEAI1...8
mA
Analog output on
RTD/analog module
MEAO1...4
3I
Three-phase current
measurement, stage A
MECU3A
3I
Three-phase current
measurement, stage B
MECU3B
Io
Neutral current
measurement, stage A
MECU1A
Io
Neutral current
measurement, stage B
MECU1B
3U
Three-phase voltage
measurement, stage A
MEVO3A
3U
Three-phase voltage
measurement, stage B
MEVO3B
Uo
Residual voltage
measurement, stage A
MEVO1A
Uo
Residual voltage
measurement, stage B
MEVO1B
Energy / Power
E, P, Q, pf
Three-phase power and
energy measurement
MEPE7
Frequency
f
System frequency
measurement
MEFR1
Transient disturbance
recorder
MEDREC16
Control function
Function block code
Current
Voltage
Recording
Table 32: Control functions
Types of control
Symbol
Circuit breaker
0↔ 1
0↔ 1
0↔ 1
Disconnector
0↔ 1
0↔ 1
0↔ 1
62
Circuit breaker 1 (2 state COCB1
inputs / 2 control outputs)
Circuit breaker 2 (2 state COCB2
inputs / 2 control outputs)
Direct open for CBs via
HMI
COCBDIR
Disconnector 1...5
CODC1...CODC5
(2 state inputs / 2 control
outputs)
Three state disconnector CO3DC1
1 (3 state inputs/ 4 control
outputs)
Three-state disconnector CO3DC2
2 (3 state inputs/ 4 control
outputs)
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
Table 32: Control functions
Types of control
Symbol
Other control functions
Control function
Function block code
Object indication 1...8
(2 state inputs)
COIND1...COIND8
On/off switch 1...4
(1 output)
COSW1...COSW4
Logic control position
selector
COLOCAT
On-load tap changer
COLTC
controller (voltage regul.)
MIMIC dynamic data
point 1...5
MMIDATA1...MMIDATA5
Alarm 1...8
(HMI, remote)
MMIALAR1...MMIALAR8
Table 33: Condition monitoring functions
Types of condition
monitoring
Symbol
Condition monitoring
function
Function block code
Circuit breaker
CBCM
CB electric wear 1
CMBWEAR1
CBCM
CB electric wear 2
CMBWEAR2
CBCM
Operate time counter 1
for used operate time
(motors)
CMTIME1
CBCM
Operate time counter 2
for used operate time
(motors)
CMTIME2
CBCM
Gas pressure monitoring CMGAS1
CBCM
Three-pole gas pressure CMGAS3
monitoring
CBCM
Spring charging control 1 CMSPRC1
CBCM
Breaker travel time 1
CMTRAV1
CBCM
Scheduled maintenance
CMSCHED
TCS
Trip Circuit Supervision 1 CMTCS1
TCS
Trip Circuit Supervision 2 CMTCS2
MCS
Supervision function of
the energizing current
input circuit
CMCU3
MCS
Supervision function of
the energizing voltage
input circuit
CMVO3
Trip circuit
Measuring circuit
63
Transformer Terminal
RET 541, RET 543, RET 545
1MRS755543
References
Additional information
Transformer Terminal RET 54_ Technical Reference 1MRS755225
Manual, General
Technical Descriptions of Functions
1MRS750889-MCD (CD-ROM only)
Installation Manual
1MR 750526-MUM
Operator’s Manual
1MR 750500-MUM
Technical Reference Manual RER 103
1MRS750532-MUM
Technical Reference Manual RER 123
1MRS751143-MUM
Protection & Control Terminals REF 54_, REM 54_,
RET 54_ and REC 523 Configuration Guideline
1MRS750745-MUM
Bus Connection Module RER 133 Technical
Description
1MRS755163
Echelon, LON and LonTalk are registered trademarks of Echelon Corporation.
All other product names or brands are trademarks, registered trademarks, or service marks of their respective owners.
Document
changes
64
Version Date
Changes
C
Table 7: Reset ratio of OV3Low and OV3High changed from 0.96 to 1.04
15.06.2005
ABB Oy
Distribution Automation
P.O. Box 699
FI-65101 Vaasa, FINLAND
Tel +358 10 22 11
Fax +358 10 224 1094
www.abb.com/substationautomation